While doing Lost Sanctuary mission and there are 2 or more players doing the same quest at the same time. While watching the nether portal cinematic, secondary player stand at the side of the bridge and watches it from far. And secondary player will still be stuck inside the barrier blocks (instead of teleporting back) after finishing the cinematic. And while stuck player can't see anything in first person (Only in third person), while being able to look around even while cinematic is playing (From what ı know you can't look around while watching a cinematic), and also player cannot use teleport scrolls. So only way out is "/kill"