At Friday I try to flight with my FPV250 race with pixracer. During liftoff copter flip-back. After second try props were destroyed. Logs are here
At logs is strange is no evidence about roll and pitch movement, so it looks like there was something wrong about estimator.
I did one thing diferent - I armed using QGC, coud it be cause?
Today I try another flight, and everything works OK(armed by RC)