fix(core,platform): remove code that moves focus to search field when deselecting items in multi-combobox

libs/core/multi-combobox/multi-combobox.component.spec.ts

@@ -172,6 +172,29 @@ describe('MultiComboBox component', () => {
         expect(propagateChangeSpy).toHaveBeenCalled();
     });
 
+    it('should not move focus to search field when deselecting all items', () => {
+        const focusToSearchFieldSpy = jest.spyOn(<any>component, '_focusToSearchField');
+        const item = component._suggestions()[0];
+
+        // Select an item first
+        component._toggleSelection(item);
+        fixture.detectChanges();
+
+        expect(item.selected).toBe(true);
+        expect(component._selectedSuggestions().length).toEqual(1);
+
+        // Toggle selection to deselect the only item
+        component._toggleSelection(item);
+        fixture.detectChanges();
+
+        // Verify item was deselected
+        expect(item.selected).toBe(false);
+        expect(component._selectedSuggestions().length).toEqual(0);
+
+        // Verify that _focusToSearchField was NOT called
+        expect(focusToSearchFieldSpy).not.toHaveBeenCalled();
+    });
+
     it('should select and unselect all items', () => {
         const selectEvent = new KeyboardEvent('keydown', {
             keyCode: A,

libs/core/multi-combobox/multi-combobox.component.ts

@@ -592,10 +592,6 @@ export class MultiComboboxComponent<T = any> extends BaseMultiCombobox<T> implem
 
         this._propagateChange(fromTokenCloseClick);
 
-        if (!this._selectedSuggestions().length) {
-            this._focusToSearchField();
-        }
-
         this._cd.detectChanges();
     }
 

libs/platform/form/multi-combobox/multi-combobox/multi-combobox.component.spec.ts

@@ -269,4 +269,24 @@ describe('MultiComboboxComponent default values', () => {
         expect(multiCombobox._suggestions.length).toEqual(component.dataSource.length);
         expect(multiCombobox._selectedSuggestions.length).toEqual(component.selectedItems.length);
     });
+
+    it('should not move focus to search field when deselecting all items', () => {
+        const focusToSearchFieldSpy = jest.spyOn(<any>multiCombobox, '_focusToSearchField');
+        const item = multiCombobox._suggestions[0];
+
+        // Ensure we start with a selected item
+        expect(item.selected).toBe(true);
+        expect(multiCombobox._selectedSuggestions.length).toEqual(1);
+
+        // Toggle selection to deselect the only item
+        multiCombobox.toggleSelection(item);
+        fixture.detectChanges();
+
+        // Verify item was deselected
+        expect(item.selected).toBe(false);
+        expect(multiCombobox._selectedSuggestions.length).toEqual(0);
+
+        // Verify that _focusToSearchField was NOT called
+        expect(focusToSearchFieldSpy).not.toHaveBeenCalled();
+    });
 });

libs/platform/form/multi-combobox/multi-combobox/multi-combobox.component.ts

@@ -158,10 +158,6 @@ export class MultiComboboxComponent extends BaseMultiCombobox implements OnInit,
 
         this._propagateChange();
 
-        if (!this._selectedSuggestions.length) {
-            this._focusToSearchField();
-        }
-
         this.detectChanges();
     }