Once I found out what causes the issue I've never had issues with it since.
Slow down dps.its not a massive dps check,tanking check or healer check. Just take it slow and you will be fine.
exactly what this guy said... honestly have a dps just not attack our only do the basic free attack. Make him feel important put a marker over his head and tell him to watch for the safe spot and lead us to victory lol.