Metagrid commands broken in Cubase 15.0.20

Maybe related to this bug:
Cubase 15.0.20 Major Bug - Cubase - Steinberg Forums

Also, try exporting your Generic Remotes from Cubase 14, and re-import into 15.

Also, if you have time, check out this thread and please add your voice:

Don’t remove Generic Remote, instead improve it? Or Improve MIDI-Remote to have same function - Cubase - Steinberg Forums

This is also a good one if you use PLE often

New Project Logical Editor / Logical Editor Improvements, Custom Scripts, Auto-LE(ALE), AI - Cubase - Steinberg Forums