An MMO-Champion poster (gbtg) discovered this today, and I felt it was necessary to post this on AJ, but currently, if you cast chaos wave on a target (while in meta form), and you LOS the warlock the second the cast is made and it lands on you, it vanishes into thin air and does 0 damage.
Tested this in a duel with a guildie, on a target dummy while messing with my UI to confirm it is indeed the case. All a player has to do now while playing against a demo lock is stand by a pillar. LOS the minute you see the big giant wave, and 0 damage.
Edited by vathral, 24 November 2012 - 11:45 PM.