Not sure when this happened, but the feature got broken:

https://user-images.githubusercontent.com/29597/130155150-18fbca13-42d7-4d7d-831e-8db4a9672d94.mp4

Using the up/down arrows to navigate the list works fine, but jumping to the next/previous component with a warning or error doesn't quite work correctly. (The scroll offset is wrong so the component is often not visible.)
utils.act(() => (renderer = TestRenderer.create(<Cont));
      const firstParentID = ((store.getElementIDAtIndex(1): any): number);
      utils.act(() =>
        dispatch({type: 'SELECT_ELEMENT_BY_ID', payload: firstParentID}),
      );
      utils.act(() => renderer.
      expect(
        [root]
           
        →    
                 <Child key="0">
             
                 <Child key="0">
                 <Child key="1">
                 <Child key="2">
             
                 <Child key="0">
                 <Child key="1">
      `);
      utils.act(T_NEXT_SIBLING_IN_TREE'}));
      utils.act(() => renderer.
      expect(
        [root]
           
             
                 <Child key="0">
        →    
                 <Child key="0">
                 <Child key="1">
                 <Child key="2">