Quad drifts randomly in Position Hold PX4

[donpournelle]

Maybe this is the same problem:

Drone stability (drifting)

Greetings community, I am currently in the middle of my first drone (quadcopter) project, and I am looking for an expert opinion on whether everything is as it should be. After searching the internet, I chose the components and put everything together. I managed to make my first flights (and crashes). What bothers me is the constant drifting of the drone. When I release the roll/pitch command, the drone starts drifting in a random direction. I say random because the drift direction is not con…

Possibly a PX4 parameter problem:
As I’ve said to him (twice)
My simulations conclusively show that random
drift can be caused by bad PID tuning.
What parameters? I dont know. I changed too many of them.