Why gimbal is initialized to yaw 90 degrees

Hello Everyone,

FW 4.0.3 with Cube Orange
gimbal is connected to serial2
mnt_type=3
serial2_protocol=1

Gimbal with Alexmos 32 bit controller is configured to use MavLink, all seems to work fine, however when it gets the information from Cube Orange it yaws 90 degrees like so:

https://youtu.be/H4JyIxnMEJE

Any idea? Am I’m missing something?
Gal