Aircraft suddenly enter a 360 barrel roll in FBWA

Hi everyone,

Help needed to understand/ pin down any issues that might cause this. so recently i did a flight and few seconds after launch (using pneumatic launcher) during a turn the aircraft studently enter a barrel roll resulting in a crash. After the crash i tested all servos and it is working as expected so i dont think it might be caused by a mechanical issue.

please anyone with some knowledge on what can cause this please do comment

i have attached the logs for this flight :

thanks!
Zeke