Hey Burkhard,
Which OS version is installed?
8.7.6.38112
While the issue is present:Is any expression pedal connected and what if you unplug that pedal?
No expression pedal connected.
Can you still change Tempo via TAP button?
I didn't try it.
What if you dial Input Source regardless which value it shows?
No idea, I didn't try it neither.
What if you reset all global settings via "Init Globals" in System Settings, while the issue is present?
I just restarted by switching down et going back to the performance mode. Now the unit works so far.
Thank you for your help.