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So there's several new spells that cause a target or projectile to start casting fireballs when certain conditions are met. They're a pretty cool new addition. The problem is... the fireballs never stop. Neither for you or mobs. The fireballs will just keep spamming forever. I just had to give up a good run because a mob with a wand caused me to start spamming fireballs uncontrollably. I was explosive immune so it barely caused any damage, but still basically made the game unplayable. Very annoying.
Yeah, it'd definitely be nice if they time-limited that particular effect. I've been in the same predicament.