Was watching my friend try the game, he started as sentinel, and he encountered a weird bug.
He could attempt to lunge an enemy offscreen (he did it on the little bridge past the guard where he first transferred to ruined era) which would result in his character being “stuck” in a lunge-like pose, like a hound. If he then tried casting a channeling skill (warpath), it would keep casting it even if he released/pressed button again, all the way until it exhausted his mana, and then he would keep spinning without “glow”, no longer damaging anyone, or draining mana.
It was bizzarre, but he was able to replicate it easily multiple times - though when i went on my character, i couldnt recreate it.