Undo on OSX not working

Although the menu flashes the undo and redo functionality does not work for me.

Any idea what the problem might be?
Thanks

Quit and relaunch the app, does it start working again? Seen this a few times where the undo manager gets “hung” temporarily.

Perfect thanks @agiletortoise!

This has just happened again and I have lost a whole important note. Is there any way I can get this back?

It will undo previous deleted notes etc, but not the text that got caught in a select all and deleted

EDIT. I restarted and the undo worked.

I’d love details if you can figure out what is triggering undo to stop working. It’s a bug I would love to resolve permanently, but have never been able to reproduce in testing.

It is unlikely you lost your whole draft, did you check the version history to restore the latest version?