" I've looked into this issue. In order to assure that that a worse bug (which caused cheat death to not work at all) did not occur under specific timing circumstances Cheat Death will sometimes reduce damage by 99% instead of 90%. Although technically this is a bug, it is not one that we can currently fix. (Source)"
That is the dumb quote of the day, of course it can be fixed, do they know how annoying it is to see youe 2k frostbolt hit for just 10 damage, and its quoted as "sometimes" its like "all the time".
Sort it out...