I've recently stopped using Chrome and swapped to Safari on my Mac. Ever since, during live streams, the sound plays for about 3 seconds and then cuts out and never comes back. If I reload the page, it plays audio again and cuts out. I have no issues in Chrome. I did just try running a live stream in a private window, and the audio plays without issue (EDIT: this has now stopped working as well). I have tried all bitrates. I use uBlock, but I have it off for GB.
Safari Version 12.0.3 (14606.4.5)
Mojave 10.14.3 (18D109)