This problem only appears to affect the April 2021 Mac version of the game, and manifests as overly-sensitive mouse movement in the character editor screen only.
If this is bothering you, go to the menu (ESC key), select Options and then Display, and set the Lock FPS setting to 30 or 60., at least while in the character editor. You will probably want to set it back to unlimited (the leftmost setting) after you're done on the character editor screen, since the problem is specific to the code used on that screen.
The problem should be fixed in the next release.
[color=#ff0000]Tech Team [/color]