The attitude of a quadcopter is unstable and almost falling when it stops against wind while horizontally moving in position control mode when wind blows about 7 - 8 m/s, although it is stable even in any more abrupt attitude maneuvering in manual mode with the same wind (so, it is not hardware problem).
The symptom does not happens in no wind.
It happens when the copter stops oppositely to the wind.
When it happens its heading mostly changes by itself about a few tens of degrees and restored.
Attitude and position parameters tuning cannot avoid it.
PX4 v1.7.3, Pixhawk2.1 + Here GNSS, EKF2, F450 sized quadcopter frame
Let me know if it is my fault or comment please.