Hello,
I am playing with Wraithlords Harbor and my Wraithlord spawns flamewarths. However, they often all just stand around and don’t shoot. No matter if I re-summon the Wraithlord, teleport the minions or whatever. Does anyone have any idea why this happens?
Yes, lots of ppl have this bug. It happens when u change zones. Still waiting on a fix.
Here is a little solution: Switch to a different skill in your skill bar to reset the wraiths. Then switch back to wraiths.
Also report it as a bug. GL 
WOW! I just saw them all shoot at once the first time thanks to your hint to reset the skill. THANKS! Amazing. I will fill a bug report too and hope that gets fixed soon. Thanks for your fast reply!