2º stage flips backwards, ignites and then flips forward again...
Yeah...
That was concerning! Especially since with a solid motor with fixed dV there is no capability to just burn a second or two longer.

Watching it, I was thinking "I'm pretty sure it's not supposed to do that..." They also didn't mention anything in the livestream, maybe they didn't want to draw attention for those who don't know better?
The fairings also came off when the rates were high, I was wondering about re-contact. Maybe that has something to do with the solar panel...