Auto-throttle is not working

I’m testing my arduplane on grownd for multiple fligh modes, but when i change the mode to CIRCLE, RTL or FBW_B the throttle stops, even with thr_min=20%.

in MANUAL, FBW_A modes the throttle works fine and the thr_min=20% works too.

i have change the throttle output to another pin but the problem remains. looks like throttle PID controler is not working.

I need some help or ideas please

i have attached my parameter list

parameter.param (6.4 KB)