QuadPlane Rear Tilt Rotors tiltin Problem

Hi everyone,
i thought I solved this by using the vectored yaw tilt type. And yes, all motors are tilting now as intended.
Now I am having the problem, that I can not yaw in QStabilize mode when hovering. The motors don’t change their rpm, when giving a yaw input.
Does anyone have any idea to solve this? Thank you already!
Frieder