Fix edge case where item was getting autofocused when backspacing

Author: LFDanLu

packages/@react-aria/selection/src/useSelectableCollection.ts

@@ -420,6 +420,12 @@ export function useSelectableCollection(options: AriaSelectableCollectionOptions
           bubbles: true
         })
       );
+
+      // If there wasn't a focusable key but the collection had items, then that means we aren't in an intermediate load state and all keys are disabled.
+      // Reset shouldVirtualFocusFirst so that we don't erronously autofocus an item when the collection is filtered again.
+      if (manager.collection.size > 0) {
+        shouldVirtualFocusFirst.current = false;
+      }
     } else {
       manager.setFocusedKey(keyToFocus);
       // Only set shouldVirtualFocusFirst to false if we've successfully set the first key as the focused key

packages/react-aria-components/test/AriaAutocomplete.test-util.tsx

@@ -395,6 +395,31 @@ export const AriaAutocompleteTests = ({renderers, setup, prefix, ariaPattern = '
           expect(actionListener).toHaveBeenCalledTimes(0);
         });
       });
+
+      it('should not autofocus the first item if backspacing from a list state where there are only disabled items', async function () {
+        let {getByRole} =  (renderers.disabledItems!)();
+        let input = getByRole('searchbox');
+        let menu = getByRole(collectionNodeRole);
+        let options = within(menu).getAllByRole(collectionItemRole);
+        expect(options[1]).toHaveAttribute('aria-disabled', 'true');
+
+        await user.tab();
+        expect(document.activeElement).toBe(input);
+        await user.keyboard('r');
+        act(() => jest.runAllTimers());
+        options = within(menu).getAllByRole(collectionItemRole);
+        expect(options).toHaveLength(1);
+        expect(input).not.toHaveAttribute('aria-activedescendant');
+        expect(options[0]).toHaveAttribute('aria-disabled', 'true');
+
+        await user.keyboard('{Backspace}');
+        act(() => jest.runAllTimers());
+        options = within(menu).getAllByRole(collectionItemRole);
+        expect(input).not.toHaveAttribute('aria-activedescendant');
+        await user.keyboard('{ArrowDown}');
+        act(() => jest.runAllTimers());
+        expect(input).toHaveAttribute('aria-activedescendant', options[0].id);
+      });
     }
 
     let filterTests = (renderer) => {