Yeah, that happens when I put "voice_enable 0" into the console. I open up the console after doing that, and there's this accumulation of "ProcessVoiceData: Voice_AssignChannel failed for client #". Even when I put "voice_enable 1" into the console, It still mutes the person talking. Usually what I do is I enable voice and reconnect. After that, I can hear the people talking again.
P.S. I know the problem's already fixed, (I think), but I'm just giving some insight on this problem.