The animation editor is personally unusable for me right now. As you can see from the following screenshot the UI is severely bugged. The bug happens 100% of the time, currently on a Windows machine. Happens to all places.
(I should mention I’m on Dark theme for studio.)
When Inverse Kinematics is enabled the move tool behaves like so:
The white broken UI appears after closing the animation editor once (while having IK enabled), and re-opening it. It then looks like this:
To fix this I currently have to delete all Studio related files and reinstall.