Favourites window only fills half of screen

Summary:

In OTBI the favourites window only fills half of the screen

Content (required):

When entering OTBI the favourites window only fills half of the screen, bottom half is empty and scroll bars don't go all the way to the bottom. When a report is opened from within the favourites window it too opens in a window that only fills half of the screen so it is truncated. This isn't browser specific as same issue occurs with Chrome and Edge but doesn't impact all users either. I have attached image of what it looks like together with one that works correctly.