NavPitch and real pitch are different

Hey, everybody.
Help me to understand the problem of switching to automatic mode.
I am using a flying wing.
At takeoff using stabilization mode everything works well, however after takeoff go into auto mode the plane starts to descend sharply and this leads to unplanned damage.
The altitudes are correct. Elevons in stabilization mode work correctly.
Found a strange place in the logs:
It is related to CTUN.NavPitch=20 but real Pitch is go down…

Post the .bin log file. Check TESC, especially pitch demand.