Unable to restore default settings

ArduPlane Plane 4.5
1

I have performed the “Full Parameter List - Reset to Default” operation. However, when I reconnect the flight controller, the old parameters still remain and the default parameters are not restored.

What’s even more strange is that after I reflash the firmware, these parameters still persist. What should I do?

mission planner1.3.82
arduplane4.5.3
Autopilot：H743

2

Parameters always persist when you reflash with a firmware of the sane vehicle type.

Flash a ArduRover FW, reboot and then a flash a ArduPlane FW and your parameters will all be at their default value