There's a bug where the Brig end prestige box Exacting Venom will apply the DoT to group members as an incurable noxious (and no, the players are not charmed). The damage isn't that big on players but we've been having problems with it applying to summoner pets and killing them right after a soulburn. Below is a screenshot of some of the hits I was seeing last night. Please fix the bug with this ability applying to group members, thanks.
After looking into this a little more, I figured out what the issue is. Any encounter spell with a beneficial component (ex: Zealous Smite, Dark Siphoning, Tap Essence, etc), will have a chance to proc it on the group that the spell was cast from.