If I setup PX4 to use a custom airframe in order to use a non standard setup, the ESC calibration done with QGroundControl doesn't work correctly, i.e. the ESCs max values seem to be set following the ...

We have had one report of a loophole in the ESC calibration procedure which can lead to the motors spinning up if the normal procedure isn't followed. To recreate the motor spin-up issue do this: plug ...