until they fix this (which will probably be never), you can always start a voice call by origin to any friend on your list, and be sure to set your mics volume in origin to 0. This way this voice chat won't produce any audio, and it'll also mute you to all members in your ingame group, as well as mute all of them to you.
This is how we cirumvent this BUG whenever it happens
This still doesn't work for me. I have mine set to PTT with mic volume at 0, yet I could clearly hear myself echoed back through others' speakers. Some in the group I could mute, some I could not.
I'd like to bump this Day 1 BUG which until this day, almost 2 years and a half later, hasn't been fixed yet.
It only happens less frequently with me because most of the people that played with me can't stand this game anymore because it's full of BUGs. But almost everytime I join a group with at least 3 people, I can't mute one of them.
