Wow. That is absolutely awful. I just played a few rounds and every single death was from losing my timing after a transformation stop in the middle of a jump or something. Such a bad gimmick. Makes the game unplayable.
Can't say that's ever happeend to me (in 30 minutes I just spent playing the game). I find it more annoying when a double jump that seems legit at the time ends up sealing your fate.