CompleteTransition if Q_TRANS_FAIL

I want to be independent of an air-speed sensor or air-speed-estimation for my VTOL plane. I set Bit19 in Q_OPTIONS, set Q_TRANS_FAIL=5 and Q_TRANS_FAIL_ACT=-1.
I tested on my desk:

  1. Transition Q_Stabilize → FBWA commanded by RC
  2. Motors tilt to Q_TILT_MAX, message: “transition airspeed wait”
  3. After 5 sec message “transition failed, time out”, but no further tilt move.

Why is the transition not completed, due to bit 19 of Q_OPTIONS ?

thanks for answers, regards Gerd