Mumble incoming sound issue

[khtk1]

Im playing PR foe some time, its worked great but suddenly I stop hearing when people talk to me on local, squad. commander and etc.
I reinstall the game and still didn't solve that.
what to do to make the mumble work again?

p.s - when im trying to speak to other squad members its making the "com" sound and show me the green speaker on the right side of the screen

[tankninja1]

Have you noticed this problem when the people are standing behind you, especially in vehicles?

[khtk1]

No, i cant hear any sound from mumble, not local channel and not on squad channel

[Kennyxp]

I have this exact same bug I can't hear anything coming in from mumble but I can hear when someone engages to talk.