I'm not 100% on what triggers this bug, but at Tarcyr you can be stuck in combat and constantly teleported and not able to synergize on the wisp to progress the boss mechanic. I was in a toxic group where one player tried to blame me for this bug and voted to eject me after overcoming the bug and defeating the boss, but since the group didn't know what triggered it, they just assumed it was me and kicked before final boss. I don't want this to happen to anyone else, so be careful!