Video of stage separation. Separation was successful. Booster appeared to not have all engines re-ignite for descent.
https://twitter.com/SpaceX/status/1725863437887242515
Interesting. The outer ring of engines was probably NOT INTENDED to fire. The inner engines ... that’s a strange pattern. I’d like to see which engines were supposed to fire.
Engine relight is one of the hardest part of what they do with those Merlins. It’s one of the most incredible things that have come out of rocketry in the last few decades. Deep cycling rocket engines is a miraculous feat of engineering considering is the focused application of an explosion in one direction.
That said, note the engines that didn’t relight were on one side. It was asymmetrical which lends credibility to the unequal pressure theory. At those speeds and in low gravity the fuel was sloshing around and likely didn’t make it where it should’ve been for the relight. Time will tell.