I know Storm of Vengeance and Blade Barrier have issues, but I've never heard anyone complain about, say, Incendiary Cloud or any of the others.Persistent Area of Effect spells work like triggers, they have OnEnter, OnExit & Heartbeat scripts. The OnEnter and OnExit scripts tend to work fine. The heartbeat seems to get such a low priority so that you may not even get one heartbeat firing before the duration of the spell expires.
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The full list of spells affected is quite long and includes...Entangle, Web, Evards Tentacles, Stinking Cloud, Cloudkill, Mind Fog, Acid Fog, Incendiary Cloud, Creeping Doom (which requires a more complex fix), Shadow Web.
I suspect they have the same problem, but it would help if folks tested them out. Try paralyzing a monster (the 400 hit point goblins in Southern M'Chek are GREAT test subjects) and cast your AoE spells on it. If you're a lvl 15 wizard, then your Incendiary Cloud should damage the goblins 15 times. Try to repeat the tests a few times, at different times and places.
Many of the new druid and mage spells might be affected: stonehold, cloud of bewilderment, vine mine, etc. While in a cloud, creatures should continue to make a saving throw each round; but if there are issues with the heartbeat priority, they might only roll a save when they enter.