Controller Pane is messed up

I have started to have a serious issue with the controller pane in the key editor window. When I go to the key editor, the controller pane is scrambled (see attached screenshot example). I can’t do any editing there…it’s all locked up. The strange thing is that when I used the snippet tool to take a screenshot of the problem, the controller pane was magically fixed and everything worked as normal.

But if I leave the key editor and return later, any track, any clip, I get the same problem. Not sure why the snippet tool temporarily unscrambles the controller pane, but maybe it’s a clue to the source of the problem. Would appreciate help to solve this issue as it completely thwarts my ability to edit my parts. Thank you.