Undo/redo seems disabled permanently

I’ve just upgraded to the new beta and I immediately noticed that I cannot undo at all. Is that only me who is having this issue?

Me too. Duplicate, open/close or something and it works again.

Working now, though I didn’t do any of the stuff that you suggested (it just started working mysteriously). Thank you anyway.

Forget it. It doesn’t undo what I did and sometimes crashes. Undo is clearly broken again.

same on a dusty 10.6.8

generally, the undo is working. There are some ways to break it. Do you remember what you did before it breaks? Not only the thinks just before but everything what you did to that glyph. Each glyph has its own undo, so it might break for one glyph but still work with an other.