Video artefacts after 2.3.1 patch

Hi All!

I have intalled OpenCore Legacy Patcher 2.3.1, installed the root patch and then upgraded to macOS 15.4. After every upgrade, I need to start in safe mode and apply again the root patch to have everything perfectly working, specially the resolution.

Unfortunately, this time I'm either getting a blank screen with only the borders of the windows

https://imgur.com/a/wmeqWeH

or if I connect the laptop to an external monitor I see other types of artefacts

https://preview.redd.it/v06kstyu8ose1.jpg?width=4032&format=pjpg&auto=webp&s=3f3d13ae8d99ccf96835caeaa8f35bc7e2226684

Either the boot phase or the safe mode are fine and I'm able to see correctly all the windows.

I have a MacBookPro11,3 (MacBook Pro 15-inc Mid 2014).

Any idea what could cause this?

Thanks!