Midi track stopped responding

Hey, currently on cubase pro 13.0.21.
I have a project with some midi tracks I use for triggering drum samples and drum gates. But suddenly one of those tracks stopped working. Some of the buttons like edit in place, musical mode and lock are greyed out. I also can’t nudge the events
image
When I duplicate the track everything is fine on the new track but for some reason I can’t delete the original track. I can disable it but not remove it…
Is this a cubase 13 bug? Never had this problem before.
Regards, Thomas

Nevermind, I suddenly found the issue. I had frozen some tracks that had a midigate on the insert that was triggered by this track.