Midi in - stops after 2 steps

hi guys … I keep having this issue…

OT slaved to A4 via midi in … A4 sends play to OT (then OT to MD via midi through, and the MD via midi through to MM) …

however, the OT plays 2 steps, and then stops, for no apparent reason… I swear when I turned the OT off last night, it was behaving like a good slave, and did what the A4 master told it to do …

transport receive ticked, clock receive ticked, prog change nothing ticked.

audio cc in not ticked
ctrl audio cc out = int
audio note in not ticked
audio note out = int

channels auto ch :11

midi sequencer CC direct connect not ticked…

and after leaving the house for 3 hours, turning the machines back on … the OT behaves as it should …