Why is the PvP sound bug not in the "known issues" of the patch notes?

You know, the one where during PvP the audio for your game will just randomly disappear until you restart the entire game?

I figured it would get an emergency hotfix a few days after 6.1, but here we are at 6.11 and it's not even listed under known issues.

Here's an example:

https://www.twitch.tv/videos/1467292913

Skip to 6:07:45 and watch for a few seconds.

This happens to me as well, but I haven't recorded a video like Preach here has.

It wouldn't be quite so annoying if I could just toggle sound on and off to fix it, but restarting the entire game is quite bad, especially if you're PvPing a lot and it keeps happening every two games.