This is something i've noticed off and on for the past year or so, but when in a party, if you have a summoner,any kind of summoner, and someone that uses aoe spells damage-spells or just crowd control.. i usually end up seeing the summon go wild and try to attack the caster after the caster casts any aoe near/on the summon.. usually the bug is just a nuisance thing where you have to force one of the players to change tact.
I honestly dont know if this is something that the server crew could handle, or if this is something that beamdog would have to fix on their end.
Steps to reproduce the Bug:
Cast any aoe, damaging or none, on or near a summoned npc.
Expected Result:
summon ignores the friendly cast.
Actual Result:
Get attacked by summon
Screenshot(s)

Additional Information/Notes
Just for reference in the picture, I had just left the shadow cordor crypts via the exit portal where i used the infini-cast burning hands.