As per the patch notes:

Raids

Draigoch isn't always willing to take a punch. We've explained to him that his lot in life is to be beat upon by players and he should really just Dragon Up and take it.
While I appreciate the attempt at humor with the patch notes, just what exactly does this mean? Is this referring to the anti-exploit bug that has plagued the raid since it's inception two years ago? Or is this something else that has only begun to crop up recently? I'm not complaining, just looking for a bit of clarity on what the patch note meant - hopefully it's the first step toward bringing Draigoch up to a scale-able raid.