Confirmed Phased out Mangara phased back during owners turn while controlled by another player

[Neo001992]

Game ID

875319636

Was in a game where an opponent had taken another opponent's Mangara with a Treachery. Later in the game that player phased out with Teferi's Protection, and the Mangara incorrectly phased back in before it's owners untap step instead of before it's controllers untap step along with the rest of the phased out cards.

https://imgur.com/a/do2QGOp

Event#268001814 Game#875319636