AutoTune Landing problem


I have a big hexa, 30" props, 26kg weight, with the 4.3.7 FW.

After finish Loiter autotune roll and pitch, the drone seems to stay in althold, but the drone keep stuck an angle of 10° front pitch with no any pitch stick. This happened after each AutoTune when I try to land.

This is the log, from the landing, If i release the pitch stick, the drone go forward 9 or 10°and a very hard movement when i try to get it back. I coudnt land it and the drone rollback.

any idea?