diff --git a/backend/src/main/resources/i18n/messages.properties b/backend/src/main/resources/i18n/messages.properties
index 0d5356269..0032a25ed 100644
--- a/backend/src/main/resources/i18n/messages.properties
+++ b/backend/src/main/resources/i18n/messages.properties
@@ -453,6 +453,7 @@ message.protocol-support-required=Protocol Support Enumeration is required if an
 message.conflict=Conflict
 message.data-version-contention=Data Version Contention
 message.contention-new-version=A newer version of this metadata source has been saved. Below are a list of changes. You can use your changes or their changes.
+message.contention-error=There was a problem saving due to a mismatched version.
 message.organization-feedback=These three fields must all be entered if any single field has a value.
 message.valid-email=Must be a valid Email Address
 message.valid-url=Must be a valid URL
diff --git a/ui/src/app/contention/component/contention-dialog.component.html b/ui/src/app/contention/component/contention-dialog.component.html
index 0922f982f..18b436d03 100644
--- a/ui/src/app/contention/component/contention-dialog.component.html
+++ b/ui/src/app/contention/component/contention-dialog.component.html
@@ -3,12 +3,16 @@
         <h4 class="modal-title"><translate-i18n key="message.data-version-contention">Data Version Contention</translate-i18n></h4>
     </div>
     <div class="modal-body">
-        <div class="d-flex w-100 justify-content-between">
+        <div class="d-flex w-100 justify-content-start">
             <i class="fa fa-fw fa-exclamation-triangle fa-3x text-warning"></i>
-            <p class="ml-2">
-                <translate-i18n key="message.contention-new-version">A newer version of this metadata source has been saved. Below are a list of changes. You can use your changes or their changes.</translate-i18n></p>
+            <p class="ml-2" *ngIf="theirs.length > 0">
+                <translate-i18n key="message.contention-new-version">A newer version of this metadata source has been saved. Below are a list of changes. You can use your changes or their changes.</translate-i18n>
+            </p>
+            <p class="ml-2" *ngIf="theirs.length < 1">
+                <translate-i18n key="message.contention-error">There was a problem saving due to a mismatched version.</translate-i18n>
+            </p>
         </div>
-        <div class="row">
+        <div class="row" *ngIf="theirs.length > 0">
             <div class="col col-6">
                 <div class="card">
                     <div class="card-header bg-info text-white">
@@ -31,16 +35,17 @@ <h4 class="modal-title"><translate-i18n key="message.data-version-contention">Da
             </div>
         </div>
     </div>
-    <div class="modal-footer">
+    <div class="modal-footer" *ngIf="theirs.length < 1">
         <button
-           
-            class="btn btn-info"
-            (click)="activeModal.close(resolutionObj)"
-            [disabled]="!resolutionObj"><translate-i18n key="action.use-mine">Use My Changes</translate-i18n></button>
-        <button
-           
-            class="btn btn-danger"
-            (click)="activeModal.dismiss(rejectionObj)"
-            [disabled]="!rejectionObj"><translate-i18n key="action.use-theirs">Use Their Changes</translate-i18n></button>
+            class="btn btn-secondary"
+            (click)="activeModal.dismiss(rejectionObj)"><translate-i18n key="action.cancel">Cancel</translate-i18n></button>
+    </div>
+    <div class="modal-footer" *ngIf="theirs.length > 0">
+        <button class="btn btn-info" (click)="activeModal.close(resolutionObj)" [disabled]="!resolutionObj">
+            <translate-i18n key="action.use-mine">Use My Changes</translate-i18n>
+        </button>
+        <button class="btn btn-danger" (click)="activeModal.dismiss(rejectionObj)" [disabled]="!rejectionObj">
+            <translate-i18n key="action.use-theirs">Use Their Changes</translate-i18n>
+        </button>
     </div>
 </div>
diff --git a/ui/src/app/contention/effect/contention.effect.ts b/ui/src/app/contention/effect/contention.effect.ts
index aa89ffbd1..55c815c71 100644
--- a/ui/src/app/contention/effect/contention.effect.ts
+++ b/ui/src/app/contention/effect/contention.effect.ts
@@ -23,12 +23,6 @@ export class ContentionEffects {
         switchMap(contention => {
             const resolutionAction = of(new ResolveContentionAction({ value: contention.resolutionObject, handlers: contention.handlers }));
             const rejectionAction = of(new CancelContentionAction({ value: contention.rejectionObject, handlers: contention.handlers }));
-            if (contention.ourChanges.length < 1) {
-                return rejectionAction;
-            }
-            if (contention.theirChanges.length < 1) {
-                return resolutionAction;
-            }
             return this.modal
                 .open(ContentionDialogComponent, DEFAULT_MODAL_OPTIONS, { contention })
                 .pipe(
diff --git a/ui/src/app/metadata/provider/effect/collection.effect.ts b/ui/src/app/metadata/provider/effect/collection.effect.ts
index 1eb9e5093..04d296c7e 100644
--- a/ui/src/app/metadata/provider/effect/collection.effect.ts
+++ b/ui/src/app/metadata/provider/effect/collection.effect.ts
@@ -33,13 +33,13 @@ import { MetadataProviderService } from '../../domain/service/provider.service';
 import * as fromProvider from '../reducer';
 import * as fromRoot from '../../../app.reducer';
 import { array_move } from '../../../shared/util';
-import { ClearProvider, ResetChanges } from '../action/entity.action';
+import { ClearProvider } from '../action/entity.action';
 import { ShowContentionAction } from '../../../contention/action/contention.action';
 import { ContentionService } from '../../../contention/service/contention.service';
 import { MetadataProvider } from '../../domain/model';
 import { AddNotification } from '../../../notification/action/notification.action';
 import { Notification, NotificationType } from '../../../notification/model/notification';
-import { WizardActionTypes, SetDisabled } from '../../../wizard/action/wizard.action';
+import { SetDisabled } from '../../../wizard/action/wizard.action';
 import { I18nService } from '../../../i18n/service/i18n.service';
 import * as fromI18n from '../../../i18n/reducer';
 import { ClearEditor } from '../action/editor.action';
diff --git a/ui/src/app/metadata/provider/effect/editor.effect.ts b/ui/src/app/metadata/provider/effect/editor.effect.ts
index 60ec2d719..28a134724 100644
--- a/ui/src/app/metadata/provider/effect/editor.effect.ts
+++ b/ui/src/app/metadata/provider/effect/editor.effect.ts
@@ -2,10 +2,7 @@ import { Injectable } from '@angular/core';
 import { Effect, Actions, ofType } from '@ngrx/effects';
 import { SchemaService } from '../../../schema-form/service/schema.service';
 
-import {
-    EditorActionTypes
-} from '../action/editor.action';
-import { map, switchMap, catchError, withLatestFrom, debounceTime } from 'rxjs/operators';
+import { map, switchMap, catchError, debounceTime } from 'rxjs/operators';
 import { of } from 'rxjs';
 import {
     LoadSchemaRequest,
@@ -18,6 +15,7 @@ import { ResetChanges } from '../action/entity.action';
 
 import * as fromWizard from '../../../wizard/reducer';
 import { Store } from '@ngrx/store';
+import { CancelContentionAction, ContentionActionTypes } from '../../../contention/action/contention.action';
 
 @Injectable()
 export class EditorEffects {
@@ -43,9 +41,14 @@ export class EditorEffects {
         map(() => new ResetChanges())
     );
 
+    @Effect()
+    $resetChangesOnContentionFail = this.actions$.pipe(
+        ofType<CancelContentionAction>(ContentionActionTypes.CANCEL_CONTENTION),
+        map(() => new ResetChanges())
+    );
+
     constructor(
         private schemaService: SchemaService,
-        private store: Store<fromWizard.WizardState>,
         private actions$: Actions
     ) { }
 }  /* istanbul ignore next */
diff --git a/ui/src/app/metadata/resolver/container/resolver-edit.component.ts b/ui/src/app/metadata/resolver/container/resolver-edit.component.ts
index 6d5e802d2..c5cc6b324 100644
--- a/ui/src/app/metadata/resolver/container/resolver-edit.component.ts
+++ b/ui/src/app/metadata/resolver/container/resolver-edit.component.ts
@@ -1,11 +1,11 @@
 import { Component, OnDestroy } from '@angular/core';
-import { Router, ActivatedRoute, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
+import { Router, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
 import { Observable, of, Subject } from 'rxjs';
-import { skipWhile, map, combineLatest, filter, takeUntil } from 'rxjs/operators';
+import { map, filter } from 'rxjs/operators';
 import { Store } from '@ngrx/store';
 import * as fromWizard from '../../../wizard/reducer';
 import * as fromResolver from '../reducer';
-import { ClearWizard, SetIndex, LoadSchemaRequest } from '../../../wizard/action/wizard.action';
+import { LoadSchemaRequest } from '../../../wizard/action/wizard.action';
 import { MetadataResolver } from '../../domain/model';
 import { Clear } from '../action/entity.action';
 import { Wizard } from '../../../wizard/model';
@@ -41,7 +41,6 @@ export class ResolverEditComponent implements OnDestroy, CanComponentDeactivate
     constructor(
         private store: Store<fromResolver.ResolverState>,
         private router: Router,
-        private route: ActivatedRoute,
         private modalService: NgbModal,
         private diffService: DifferentialService
     ) {
diff --git a/ui/src/app/metadata/resolver/effect/entity.effect.ts b/ui/src/app/metadata/resolver/effect/entity.effect.ts
index badd1925c..f869a55dc 100644
--- a/ui/src/app/metadata/resolver/effect/entity.effect.ts
+++ b/ui/src/app/metadata/resolver/effect/entity.effect.ts
@@ -12,11 +12,12 @@ import {
     Clear,
     Cancel,
     UpdateChangesRequest,
-    UpdateChangesSuccess
+    UpdateChangesSuccess,
+    UpdateSaving
 } from '../action/entity.action';
 import * as provider from '../action/collection.action';
 
-import { ShowContentionAction } from '../../../contention/action/contention.action';
+import { CancelContentionAction, ContentionActionTypes, ShowContentionAction } from '../../../contention/action/contention.action';
 
 import { ResolverCollectionActionTypes } from '../action/collection.action';
 import { ResolverService } from '../../domain/service/resolver.service';
@@ -69,6 +70,12 @@ export class EntityEffects {
         })
     );
 
+    @Effect()
+    $resetChangesOnContentionFail = this.actions$.pipe(
+        ofType<CancelContentionAction>(ContentionActionTypes.CANCEL_CONTENTION),
+        map(() => new UpdateSaving(false))
+    );
+
     constructor(
         private store: Store<fromRoot.State>,
         private service: ResolverService,
diff --git a/ui/src/app/schema-form/widget/array/array.component.html b/ui/src/app/schema-form/widget/array/array.component.html
index 2bcf6271b..84a5a1e9b 100644
--- a/ui/src/app/schema-form/widget/array/array.component.html
+++ b/ui/src/app/schema-form/widget/array/array.component.html
@@ -38,9 +38,10 @@
                     </ng-container>
                     <ng-container *ngSwitchCase="'object'">
                         <div #acc>
-                            <div class="d-flex justify-content-between" (click)="acc.isHidden = !acc.isHidden">
+                            <div class="d-flex justify-content-between align-items-center" >
                                 <span>
-                                    <i class="fa fa-fw" [ngClass]="{'fa-chevron-right': acc.isHidden, 'fa-chevron-down': !acc.isHidden}"></i>
+                                    <button class="btn btn-text" (click)="acc.isHidden = !acc.isHidden"><i class="fa fa-fw" [ngClass]="{'fa-chevron-right': acc.isHidden, 'fa-chevron-down': !acc.isHidden}"></i></button>
+                                    
                                     &nbsp;
                                     <translate-i18n key="label.new-of-type" [params]="{ type: (itemProperty.schema.title | translate) }"></translate-i18n>
                                     <ng-container *ngIf="itemProperty.schema.properties.makeDefault">
diff --git a/ui/src/app/schema-form/widget/boolean-radio/boolean-radio.component.html b/ui/src/app/schema-form/widget/boolean-radio/boolean-radio.component.html
index 8b335f58e..217dd94ee 100644
--- a/ui/src/app/schema-form/widget/boolean-radio/boolean-radio.component.html
+++ b/ui/src/app/schema-form/widget/boolean-radio/boolean-radio.component.html
@@ -8,18 +8,18 @@
     <span *ngIf="schema.description" class="sr-only"><translate-i18n [key]="schema.description">{{ schema.description }}</translate-i18n></span>
     <div class="d-flex">
         <ng-container *ngFor="let option of schema.oneOf; let i=index;">
-            <div class="custom-control custom-radio custom-control-inline">
+            <div class="form-check mr-3">
                 <input
-                    disableValidation="true"
-                    class="custom-control-input"
+                    class="form-check-input"
                     [id]="formProperty._canonicalPath + '.' + option.enum[0]"
                     [formControl]="control"
                     [name]="name"
                     [value]="option.enum[0]"
                     type="radio"
-                    [attr.disabled]="schema.readOnly">
+                    [attr.disabled]="schema.readOnly"
+                    disableValidation="true">
                 <label
-                    class="custom-control-label"
+                    class="form-check-label"
                     [for]="formProperty._canonicalPath + '.' + option.enum[0]">
                     <translate-i18n [key]="option.description">{{ option.description }}</translate-i18n></label>
             </div>
diff --git a/ui/src/app/schema-form/widget/check/checkbox.component.html b/ui/src/app/schema-form/widget/check/checkbox.component.html
index 62be86566..538251826 100644
--- a/ui/src/app/schema-form/widget/check/checkbox.component.html
+++ b/ui/src/app/schema-form/widget/check/checkbox.component.html
@@ -1,17 +1,17 @@
 <div class="widget form-group">
     <ng-container *ngIf="schema.type !== 'array'">
         <div class="d-flex justify-content-start">
-            <div class="custom-control custom-checkbox custom-control-inline custom-control-reverse"
+            <div class="form-check control-reverse"
                 [id]="formProperty._canonicalPath + '.parent'">
                 <input [formControl]="control"
-                    class="custom-control-input"
+                    class="form-check-input"
                     [attr.name]="name"
                     [indeterminate]="control.value !== false && control.value !== true ? true :null"
                     type="checkbox"
                     [attr.disabled]="schema.readOnly?true:null"
                     [id]="formProperty._canonicalPath"
                     [disableValidation]="true">
-                <label [attr.for]="formProperty._canonicalPath" class="custom-control-label">
+                <label [attr.for]="formProperty._canonicalPath" class="form-check-label">
                     <translate-i18n [key]="schema.title">{{ schema.title }}</translate-i18n>
                 </label>
             </div>
diff --git a/ui/src/app/schema-form/widget/radio/radio.component.html b/ui/src/app/schema-form/widget/radio/radio.component.html
index 316161909..de9187120 100644
--- a/ui/src/app/schema-form/widget/radio/radio.component.html
+++ b/ui/src/app/schema-form/widget/radio/radio.component.html
@@ -4,16 +4,14 @@
         <translate-i18n [key]="schema.description">{{schema.description}}</translate-i18n>
     </span>
     <ng-container *ngFor="let option of schema.oneOf; let i = index;">
-        <div class="custom-control custom-radio custom-control-inline" [ngClass]="schema.widget.class">
-            <input class="custom-control-input"
-                [formControl]="control"
+        <div class="form-check" [ngClass]="schema.widget.class">
+            <input class="form-check-input"
                 type="radio"
-                [attr.name]="name"
+                [name]="name"
                 [id]="formProperty._canonicalPath + '.' + i"
                 [value]="option.enum[0]"
-                [attr.disabled]="schema.readOnly"
                 disableValidation="true">
-            <label class="custom-control-label" [for]="formProperty._canonicalPath + '.' + i">
+            <label class="form-check-label" [for]="formProperty._canonicalPath + '.' + i">
                 <translate-i18n [key]="option.description">{{option.description}}</translate-i18n>
             </label>
         </div>