I need help with investigating why crash happened. Copter was flying without problems several times earlier. That’s new setup with t-motor coax 501x motors and alpha escs integrated in arms, Cube Orange, Here+, 6s, 20" propellers. I changed the propellers from 18" to 20" and started autotune to get better parameters. For few minutes it was ok and suddenly copter started to rotate in yaw. It was in alt hold and I had to disarm during flight because I could not get control over copter. Earlier copter was flying ok the only problem which I sow before flight was duplicate node of can bus. Any idea what happened ? Where should I search for problem ?
My log from that flight is here: