Weird focus/cursor issues

[pmiddend]

After upgrading to emacs 29.1 now, I'm having weird "focus" issues. See this video:

simplescreenrecorder-2023-12-22_11.42.27.mp4

As you can see, the cursor (or caret?) isn't filled, but an outline, and it stays that way until I randomly switch windows. While it's in this outlined state, editor commands like "delete line" don't work as expected.

What could cause this?

[tazjin]

There's a bunch of bug reports about this, and a bunch of patches (some in master) that fix this for some people.

See for example: #889, #924

Maybe one of the workarounds will help you. I personally have given up on fixing it until it fixes itself somehow, none of the workarounds helped for me.