Yea I think I mentioned this in another thread; also those are not the only AOE spells that seem to hang around forever (ever across saves). Er I mean that is not the only location - had another fight somewhere else with the same issue.
Originally Posted by Fiach
Dunno if this is working as intended, but when you fight the crabs at the start, the AoE spells just stay around after the fight, you cannot progress without injury, if this is the way it's supposed to work and that will continue throughout the game, I cant see my self playing any further.