As a general tip to help folks cope with this until it's fixed - through trial and error I've found that, generally speaking, activating the immerse audio trial seems to fix issues outdoors and in content with lots of players, but causes much worse clipping in indoor areas (especially tiny instances like rising stones, red ruby office etc). I've been pretty much toggling it on and off to get through the game without issues - albeit occasionally getting caught out when an msq cutscene takes me indoors/outdoors somewhere without an opportunity to change settings.

my very uneducated guess here is that the spatial audio calculates sound bouncing off walls and stuff, which gets intensive in an enclosed space.

For the record I'm using an FX-9370 OC'd to 4.7Ghz.