This may have been reported already, but still not fixed after days.. So I may aswell leave it here again.
Subject: Sorah KQ (level 95+)
Current situation: Sorah KQ can't be completede (always failed) due to chest at the end keeps feeling up the HP bar, so it's impossible to kill it.
Expected situation: Chest doesn't fill, meaning it can be destroyed and the KQ is completed (as usual).
Client Version: 1.02.277
This didn't happen before the last patch.