aircraft tilt and AP disconnection

[PATRICK-D]

Hello Jean-Luc
I sometimes notice in full flight that the plane starts flapping its wings once to the right, once to the left by more than 20° and deactivates the autopilot
Do you have any idea where this problem could come from?
thanks a lot for your help
Cordially
patrick

[michael1508]

Same issue, as discussed here?

https://jeehell.org/forum/viewtopic.php?t=93