Sound / Audio Cutting Out Randomly

Client Version: Direct X11 2016.12.19.0000.0001(2291249)

Locations this happens: Totally Random. Instanced content and open world.

Sometimes the sound just cuts out mid way through content. This happens regardless of what I have running (if at all) in the background. It's happened since 3.0 launch until now.

I'll just be doing any kind of content (dungeon, fates, marketboard, raid, talking to NPCs) and the sound will just drop for the game. PC sounds are fine when tested and I have to relaunch the client to get sound again.

Tried re-installing twice to see if this would fix the issue. Even formatted PC and reinstalled again. This happens quite rarely (at least 3 times a month) but it seems odd for it to keep happening.