Swash locking up when flight modes are changed

ArduCopter Traditional Helicopter
1

Hi
I’ve have a 450 Heli with a pixhawk and Taranis Firmware updated to V3.4.4. I have setup the swash as per ROB’s Video


All has gone well, but if I change the flight mode from Stablize the swash moves down to the low position, and locks up.I have tried various flight modes.

2

Solved. You need GPS Lock