It was reported in another thread, but there are a few targeting issues with the Heal routine.
If you watch the targeting window you see that either nothing is targeted, or an NPC is targetted. It spam broadcastss a NULL heal broadcast (usually something incorrect is targetted). The tank dies from underhealing. I don't understand why it spams the broadcast because the broadcast is within an /if statement that requires a successful cast event (? is the cast event not cleared?). It also sometimes tries to spam heal an NPC... and I can't figure out where it's getting that targeting ID because I have DPS off.
I tried tracking the error and so far either the ${tankid} in the heal section is "lost" or the groupmemberid is lost.
The issue primarily seems to happen when HealQueue is called (primarily from the Promised line) or from a direct heal to ${tankid}, and the heal is broadcast, as noted above, and reports as NULL. Or it somewhere is picking up an NPC and tries to spam heal.
I have two groups working a spot for AA experience. Usually happens when things start to get messy about 5 minutes in.
JJB