About VTOL mode

We are currently testing VTOL with PX4.

I made various settings and a big error occurred during the flight test.

Flying with fixed wages
The moment you turn into a quad-copter
The plane crashes without control.

At the moment of the crash, the front part of the airplane is lifted so high that you can not control your posture.

If you like, you can also send a test video.

I need help.

Sorry to hear about your crash. Can you please upload the log to logs.px4.io and share the link here?