OP1 Knobs not working when synced to OPZ

Has anyone seen such an issue:

When I midi sync OP1 to OPZ(master) over USB, after couple of minutes OP1 all parameter knobs stop responding. Need to restart the device.

Factory reset didn’t help. Firmware 243
Also tried turning off MIDI from OPZ, only midi clock out was on. Nothing helps.

Any ideas what could be a solution (and reason for this? Thanks :pray: