Pressing Up or Down arrows in Media Bay makes window get narrower

Cubase
1
  1. Open up MediaBay, and attempt to search for an item.
  2. The main, central window will fill up with all your results.
  3. Highlight any item.
  4. Then press the Up or Down arrow, in an attempt to navigate the list
  5. You will see that each time the highlight field moves to another selection, the MediaBay window gets incrementally smaller (i.e.: it narrows.)

I am on an M2 MacBook Air/24 GB of RAM.