is this a common occurrence?

[Rufalus]

If a tank consistently gets hit by avoidable damage, he's making your life very difficult and anyone trying to blame you for the inevitable wipes is a moron.

And that frontal attack from the brayflox dragon badly hurts. It does something like 80% of your HP. If they are going to stand in it repeatedly, they are clearly wrong to place the blame on anyone else.