I remember seeing some people mentioning this bug a while back, but do not remember if they ever found a fix. I cannot go past the first page of this thread:
http://www.enworld.org/forum/showthread.php?490583-Is-the-Monk-of-the-Long-Death-overpowered
http://www.enworld.org/forum/showthread.php?490583-Is-the-Monk-of-the-Long-Death-overpowered