diff --git a/src/app/+collection-page/collection-item-mapper/collection-item-mapper.component.html b/src/app/+collection-page/collection-item-mapper/collection-item-mapper.component.html
index 20da923cc3..b455ecfe3f 100644
--- a/src/app/+collection-page/collection-item-mapper/collection-item-mapper.component.html
+++ b/src/app/+collection-page/collection-item-mapper/collection-item-mapper.component.html
@@ -15,11 +15,12 @@
         </div>
       </div>
 
-      <ngb-tabset (tabChange)="tabChange($event)">
+      <ngb-tabset (tabChange)="tabChange($event)" [destroyOnHide]="false">
         <ngb-tab title="{{'collection.item-mapper.tabs.browse' | translate}}">
           <ng-template ngbTabContent>
             <div class="mt-2">
               <ds-item-select class="mt-2"
+                [key]="'browse'"
                 [dsoRD$]="collectionItemsRD$"
                 [paginationOptions]="(searchOptions$ | async)?.pagination"
                 [confirmButton]="'collection.item-mapper.remove'"
@@ -32,6 +33,7 @@
           <ng-template ngbTabContent>
             <div class="mt-2">
               <ds-item-select class="mt-2"
+                [key]="'map'"
                 [dsoRD$]="mappingItemsRD$"
                 [paginationOptions]="(searchOptions$ | async)?.pagination"
                 [confirmButton]="'collection.item-mapper.confirm'"
diff --git a/src/app/+item-page/edit-item-page/item-collection-mapper/item-collection-mapper.component.html b/src/app/+item-page/edit-item-page/item-collection-mapper/item-collection-mapper.component.html
index c1989acf22..92cdc71a61 100644
--- a/src/app/+item-page/edit-item-page/item-collection-mapper/item-collection-mapper.component.html
+++ b/src/app/+item-page/edit-item-page/item-collection-mapper/item-collection-mapper.component.html
@@ -19,6 +19,7 @@
           <ng-template ngbTabContent>
             <div class="mt-2">
               <ds-collection-select class="mt-2"
+                [key]="'browse'"
                 [dsoRD$]="itemCollectionsRD$"
                 [paginationOptions]="(searchOptions$ | async)?.pagination"
                 [confirmButton]="'item.edit.item-mapper.buttons.remove'"
@@ -30,6 +31,7 @@
           <ng-template ngbTabContent>
             <div class="mt-2">
               <ds-collection-select class="mt-2"
+                [key]="'map'"
                 [dsoRD$]="mappingCollectionsRD$"
                 [paginationOptions]="(searchOptions$ | async)?.pagination"
                 [confirmButton]="'item.edit.item-mapper.buttons.add'"
diff --git a/src/app/app.reducer.ts b/src/app/app.reducer.ts
index 4702bbe354..6a4a38e96b 100644
--- a/src/app/app.reducer.ts
+++ b/src/app/app.reducer.ts
@@ -14,7 +14,11 @@ import {
 } from './+search-page/search-filters/search-filter/search-filter.reducer';
 import { notificationsReducer, NotificationsState } from './shared/notifications/notifications.reducers';
 import { truncatableReducer, TruncatablesState } from './shared/truncatable/truncatable.reducer';
-import { objectSelectionReducer, ObjectSelectionsState } from './shared/object-select/object-select.reducer';
+import {
+  ObjectSelectionListState,
+  objectSelectionReducer,
+  ObjectSelectionsState
+} from './shared/object-select/object-select.reducer';
 
 export interface AppState {
   router: fromRouter.RouterReducerState;
@@ -25,7 +29,7 @@ export interface AppState {
   searchSidebar: SearchSidebarState;
   searchFilter: SearchFiltersState;
   truncatable: TruncatablesState,
-  objectSelection: ObjectSelectionsState
+  objectSelection: ObjectSelectionListState
 }
 
 export const appReducers: ActionReducerMap<AppState> = {
diff --git a/src/app/shared/object-select/object-select.reducer.ts b/src/app/shared/object-select/object-select.reducer.ts
index a023ce4a9e..617e0242e0 100644
--- a/src/app/shared/object-select/object-select.reducer.ts
+++ b/src/app/shared/object-select/object-select.reducer.ts
@@ -37,11 +37,11 @@ export function objectSelectionReducer(state = initialState, action: ObjectSelec
     case ObjectSelectionActionTypes.INITIAL_SELECT: {
       if (isEmpty(state) || isEmpty(state[action.key]) || isEmpty(state[action.key][action.id])) {
         return Object.assign({}, state, {
-          [action.key]: {
+          [action.key]: Object.assign({}, state[action.key], {
             [action.id]: {
               checked: true
             }
-          }
+          })
         });
       }
       return state;
@@ -50,11 +50,11 @@ export function objectSelectionReducer(state = initialState, action: ObjectSelec
     case ObjectSelectionActionTypes.INITIAL_DESELECT: {
       if (isEmpty(state) || isEmpty(state[action.key]) || isEmpty(state[action.key][action.id])) {
         return Object.assign({}, state, {
-          [action.key]: {
+          [action.key]: Object.assign({}, state[action.key], {
             [action.id]: {
               checked: false
             }
-          }
+          })
         });
       }
       return state;
@@ -62,31 +62,31 @@ export function objectSelectionReducer(state = initialState, action: ObjectSelec
 
     case ObjectSelectionActionTypes.SELECT: {
       return Object.assign({}, state, {
-        [action.key]: {
+        [action.key]: Object.assign({}, state[action.key], {
           [action.id]: {
             checked: true
           }
-        }
+        })
       });
     }
 
     case ObjectSelectionActionTypes.DESELECT: {
       return Object.assign({}, state, {
-        [action.key]: {
+        [action.key]: Object.assign({}, state[action.key], {
           [action.id]: {
             checked: false
           }
-        }
+        })
       });
     }
 
     case ObjectSelectionActionTypes.SWITCH: {
       return Object.assign({}, state, {
-        [action.key]: {
+        [action.key]: Object.assign({}, state[action.key], {
           [action.id]: {
             checked: (isEmpty(state) || isEmpty(state[action.key]) || isEmpty(state[action.key][action.id])) ? true : !state[action.key][action.id].checked
           }
-        }
+        })
       });
     }
 
diff --git a/src/app/shared/object-select/object-select.service.ts b/src/app/shared/object-select/object-select.service.ts
index 91772d2db4..2dbb69fe53 100644
--- a/src/app/shared/object-select/object-select.service.ts
+++ b/src/app/shared/object-select/object-select.service.ts
@@ -12,7 +12,6 @@ import { hasValue } from '../empty.util';
 import { map } from 'rxjs/operators';
 import { AppState } from '../../app.reducer';
 
-const selectionStateSelector = (state: ObjectSelectionsState) => state.objectSelection;
 const objectSelectionsStateSelector = (state: ObjectSelectionListState) => state.objectSelection;
 const objectSelectionListStateSelector = (state: AppState) => state.objectSelection;
 
@@ -23,7 +22,7 @@ const objectSelectionListStateSelector = (state: AppState) => state.objectSelect
 export class ObjectSelectService {
 
   constructor(
-    private store: Store<ObjectSelectionsState>,
+    private store: Store<ObjectSelectionListState>,
     private appStore: Store<AppState>
   ) {
   }
@@ -35,7 +34,7 @@ export class ObjectSelectService {
    * @returns {Observable<boolean>} Emits the current selection state of the given object, if it's unavailable, return false
    */
   getSelected(key: string, id: string): Observable<boolean> {
-    return this.store.select(selectionByIdSelector(id)).pipe(
+    return this.store.select(selectionByKeyAndIdSelector(key, id)).pipe(
       map((object: ObjectSelectionState) => {
         if (object) {
           return object.checked;
@@ -47,12 +46,12 @@ export class ObjectSelectService {
   }
 
   /**
-   * Request the current selection of all objects
+   * Request the current selection of all objects within a specific list
    * @returns {Observable<boolean>} Emits the current selection state of all objects
    */
-  getAllSelected(): Observable<string[]> {
-    return this.appStore.select(objectSelectionsStateSelector).pipe(
-      map((state: ObjectSelectionsState) => Object.keys(state).filter((key) => state[key].checked))
+  getAllSelected(key: string): Observable<string[]> {
+    return this.appStore.select(objectSelectionListStateSelector).pipe(
+      map((state: ObjectSelectionListState) => Object.keys(state[key]).filter((id) => state[key][id].checked))
     );
   }
 
@@ -111,14 +110,14 @@ export class ObjectSelectService {
 
 }
 
-function selectionByIdSelector(id: string): MemoizedSelector<ObjectSelectionsState, ObjectSelectionState> {
-  return keySelector<ObjectSelectionState>(id);
+function selectionByKeyAndIdSelector(key: string, id: string): MemoizedSelector<ObjectSelectionListState, ObjectSelectionState> {
+  return keyAndIdSelector<ObjectSelectionState>(key, id);
 }
 
-export function keySelector<T>(key: string): MemoizedSelector<ObjectSelectionsState, T> {
-  return createSelector(selectionStateSelector, (state: ObjectSelectionState) => {
-    if (hasValue(state)) {
-      return state[key];
+export function keyAndIdSelector<T>(key: string, id: string): MemoizedSelector<ObjectSelectionListState, T> {
+  return createSelector(objectSelectionsStateSelector, (state: ObjectSelectionsState) => {
+    if (hasValue(state) && hasValue(state[key])) {
+      return state[key][id];
     } else {
       return undefined;
     }
diff --git a/src/app/shared/object-select/object-select/object-select.component.ts b/src/app/shared/object-select/object-select/object-select.component.ts
index 58953d3abb..d99330a15b 100644
--- a/src/app/shared/object-select/object-select/object-select.component.ts
+++ b/src/app/shared/object-select/object-select/object-select.component.ts
@@ -11,6 +11,9 @@ import { ObjectSelectService } from '../object-select.service';
  */
 export abstract class ObjectSelectComponent<TDomain> implements OnInit, OnDestroy {
 
+  @Input()
+  key: string;
+
   /**
    * The list of DSpaceObjects to display
    */
@@ -49,11 +52,11 @@ export abstract class ObjectSelectComponent<TDomain> implements OnInit, OnDestro
   }
 
   ngOnInit(): void {
-    this.selectedIds$ = this.objectSelectService.getAllSelected();
+    this.selectedIds$ = this.objectSelectService.getAllSelected(this.key);
   }
 
   ngOnDestroy(): void {
-    this.objectSelectService.reset();
+    this.objectSelectService.reset(this.key);
   }
 
   /**
@@ -61,7 +64,7 @@ export abstract class ObjectSelectComponent<TDomain> implements OnInit, OnDestro
    * @param {string} id
    */
   switch(id: string) {
-    this.objectSelectService.switch(id);
+    this.objectSelectService.switch(this.key, id);
   }
 
   /**
@@ -70,7 +73,7 @@ export abstract class ObjectSelectComponent<TDomain> implements OnInit, OnDestro
    * @returns {Observable<boolean>}
    */
   getSelected(id: string): Observable<boolean> {
-    return this.objectSelectService.getSelected(id);
+    return this.objectSelectService.getSelected(this.key, id);
   }
 
   /**
@@ -82,7 +85,7 @@ export abstract class ObjectSelectComponent<TDomain> implements OnInit, OnDestro
       take(1)
     ).subscribe((ids: string[]) => {
       this.confirm.emit(ids);
-      this.objectSelectService.reset();
+      this.objectSelectService.reset(this.key);
     });
   }