MacBook not screen mirroring properly after update to Monterey.

Hi all!

I'm on a 13 inch, mid-2012 MacBook Pro with 8 GB RAM. After a bit of trouble I got Monterey installed and working well. At first, I couldn't get my laptop to screen mirror to my Apple TV Box or iPad properly. Then after a couple tries it started working fine. Recently, I updated to the latest OCLP 1.4.2, and was asked to install the root patches again and restart. Since then, screen mirroring doesn't work anymore.

On the iPad the picture is really distorted and buggy and on my Apple TV there's just a black screen. Universal control works fine though, and I'm also able to mirror my iPad and iPhone to my laptop without issue.

I would love to get screen mirroring to work from my MacBook. As I wrote, it stopped working again after the OCP update. I've tried reinstalling an older version of OCLP and rewatching. No dice.

Any thoughts?

Thanks all!