I had reported this earlier, and just checked by adding media to a game in beta 6, and after adding the image and the grid refreshes it seems to be back to normal now and the grid does not "jump". It stays focused on the same spot. Thank you for the fix.
Also, just an unrelated general observation... I notice how fast and smooth the grid can scroll now, even with a large number of games, I compare this to my memory of how super clunky the scrolling used to be (talking years ago), and this has come a really long way, performance wise, and it just looks a whole lot better.