I found a lot of bugs in Cubase 12 pro. About 10 in 2 days!! Is not an alfa release but a professional software that I pay a lot of money. The last one is thet after play a drum kit with Groove Agent, I delete the track and I add Halion Sonic with a violin. Playng on keyboard I heared battery with violin play togheter. I delete all track… and the sound of Groove agent persist to play. Only solution was close the program and launch again.
Did you try the MIDI reset thing (in the MIDI menu) ?
No, Maybe nex time I will . Thanks.