Basically if I ever DC, even if i re log in and reconnect to the server, I can never join voice chat. My work around has been to relaunch the game, however this can be frustrating if I DC mid comp match.
Combined with the other bug i mentioned ( where the game freezes and DC’s me shortly after launching) and I might spend and hour launching and relaunching the game until I get a version that actually works as intended.
Chances are you are still having connection issues overall if this is happening. Be sure to check both of these guides for tips: