Ran chain FATEs last night for about 3 hours and didn't experience the audio issue as I previously had, but did have it a bit while crafting/checking my retainers in my house (which I didn't have an issue with previously).
It seems mildly better, but it might just be a coincidence on my end.
Hoping that next week's patch does something to remedy this- I really want to turn my sound back up again.