Unable to flip 360 degrees in Acro

Greetings.

I was playing around in ACRO with my hexacopter, running stock 4.3.4 version, and decided to try a loop or a barrel roll. Getting to about 40-45 m AGL, drop the throttle and give it full stick at the same time, copter rolls upside down but doesn’t roll further. When I kick the throttle back in, it self levels (couple of metres above grass).
Is it normal behavior ? Do i need to mess with PIDs to increase rate of roll/pitch ?

Thanks

You need to disable acro trainer

Thank you!
Still didn’t do the full 360 :slight_smile: now reprinting new arms…