AUTOTUNE doesn't work

Hello, folks!

I’ve tried today to tune my PID’s with Autotune (before that I always used manual tuning), but I didn’t succeed. According to the instructions the PIDs should change to some defaults values as soon as I enter the Autotune Mode, but they didn’t change completely during the 2 min flight, not mentioning every 10 sec.

Pixhawk, Arduplane 3.2.0
Analog airspeed, flying wing airframe.

I couldn’t managed to find the same problem in any forums, so please help =)
The log file is attached,

I am facing what appears to be the same issue on a wing; I am posting about it here: