7.1 Surround Sound Discord issues

If i set 7.1 Surround Sound as output device in Discord i can hear Discord sound, but not people voices.
They can hear me.
The only way to get voices is set standard Realtek HDA Speakers as output device.
The issue started yesterday, I've always been able to use 7.1 Surround Sound.
When i try to test audio channels in Windows Mixer, I can't hear anything, most channels are mute. Most channels are mute also in some games like Star Wars Battlefront 2, so I have to use Stereo settings and I can't use 7.1.
7.1 Surround sound also doesn't work with Obs Studio.
Can you help?
I already unistalled and installed again driver and Razer app, but it doesn't work.