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.)
<Child>
             
                 <Child>
        →        <Child>
      `);
      // Select its parent
      utils.act(T_PARENT_ELEMENT_IN_TREE'}));
      utils.act(() => renderer.
      expect(
        [root]
           
             
                 <Child>
                 <Child>
        →    
                 <Child>
                 <Child>
      `);
      // Select grandparent
      utils.act(T_PARENT_ELEMENT_IN_TREE'}));
      utils.act(() => renderer.
      expect(
        [root]
        →  
             
                 <Child>
                 <Child>
             
                 <Child>
                 <Child>