All debuffs you take last for an hour unless its clear condition happens (esuna or specific boss mechanic: A doom is also cleared upon death, a stunlock that requires killing an object is also resetted when the object is removed). Everyone will be walking around with vuln stacks in the overworld! And if you take a doom debuff... you will die 1 hour later far after the duty completed, or in the next dungeon. Boss mechanics that use magic vuln will (to make things clearable) be excluded from this and reset upon a wipe, but your vuln stacks are most likely still going to be a problem.

Now we motivate players to do mechanics properly!