I have a pixhawk 2.4.1 clone. When I take off in Alt hold mode and invoke autotune, the copter starts tuning. After 25-30 iterations, I land it and save new pids by dis arming quad in autotune mode. When I refresh parameters, I cant see change in PID values. I have tried to do one axis at a time, two axis at a time but same thing. The values were same as before.