Crash testing QLOITER with 2 Mot vectored Tailsitter

Start in QSTABILIZE, switching to QHOVER always perfect.
Transitions, Backtransition, FBWA,B and Cruise also.
Finally testing QLOITER. After selecting, small vibrations and suddenly hard pitch.
After immediatly switching back to QHOVER, pitching more and finally crashed with full power.
I recognized a Lane switch 1 message in the log and a Compass Reset.

Log :
Video :