Sounds replaced by ear-ringing mid-combat
At least this isn’t anything very new, since I can remember this happening infrequently, but already many months back. Generally in combat with massive number of players involved. If it’s a feature, it isn’t very nice one. It doesn’t happen often, and I end up just restarting the client after the fight is over, to fix it.
Apologies for the late answer!
I’m not sure how infrequently it’s supposed to happen but I experience it at least once an hour. Usually after an explosion-like skill, which tends to be much louder than the rest, is used near me. Either by a mob or another player.
On the bright side, for me the sounds always return on their own with no client restart needed. The time varies but these ear-ringing episodes are never longer than a minute.