A few have probably already reported this, can't be bothered to flip through the entire forum; besides, more voices are more likely to be heard. In short...
FIX THE RENDERING PRIORITY LIST PLEASE
This issue is pretty much an anniversary issue, back then it started with Behemoth/Odin, and as unbelievable as it is, it still exists. Nevermind the general bad atmosphere hunts generate in every zone thanks to shouts; nevermind the completely insane reward system; it simply is infuriating to arrive at a spot with already an army of people - and seeing that but not the actual mark I've trekked through the entire zone for. And of course the next thing I know, from the chat and lack of flashy effects, is that the mark is dead. Please do something about this already.