Another user from Russia caught "rodeo effect" (as we call it ) on his reflashed Msuper V3. Then he changed board by warranty claim and it was reflashed again to be sure. And it still reproduces.
Besides that fact that he fallen down at ~40km/h, which led to, thanks fortune and safety gear, minor injuries - he claims that he managed to find workaround and conditions to reproduce that issue:
Conditions to reproduce: It seems that firmware has some calibration algorithm which not persists it's values during wheel powering off. So, to catch "rodeo" you should have latest firmware and try to start moving right directly forward after powering on, then you'll have big chance to catch this bug on bumps.
Workaround: to avoid "rodeo effect" you should move your wheel forward and backward a couple of times right after turning it on.