mRo Pixracer R15 compass variance error

Hello,

I am using your products on multiple drone setups and i am experiencing a major problem. please advise how to solve it.

problem discription :

anytime the drone is taking off via throw mode a compass error occurs which does not reset throughout the flight.

compass error occurs in strong bursts of motors as well

note : in all setups internal compass is disabled

drone 1 setup

flight controller - mRo pixracer R15

compass - mRo GPS u-Blox Neo-M8N Dual Compass LIS3MDL+ IST8310

batteries - 6s

drone 2 setup

flight controller - mRo pixracer R15

compass - mRo uGPS ublox SAM M8Q (GLONASS) + Compass (LIS3MDL)

batteries - 4s

the problem is the same in both drones and is currently grounding my drones.