in Event Terrors of Shadows:
PW: Gideon Blackblade Vs. Teferi
Blackblade token created, granting prevent damage, which was exiled by Teferi PW 3rd ability after 2 rounds.
My PW still kept „prevent damage“ over several rounds (5-6) without blackblade token on board until game was freezing completely
I had the same issue occur after exiling the token with Kaya’s 2nd ability.
I continued playing it long enough for the opponent to get another Blackblade token which this time I killed with a regular Destroy effect (Deathsprout) and the opponent still kept Prevent Damage.
I have this issue occurred just a moment ago, during Hunter X Bonder coalition event. It happened after I exiled the token with Eat To Extinction. I had to left to game, since I had no way to win that game.
This issue should be fixed asap, since it allows to have players lost their games in a very easy way.