Had the same issue with my 75t Elite on OSX with Slack Huddles. It seems like the root cause was the "Enable automatic gain control", or something along those lines.
It was super annoying, as they kept muting me mid-sentence, but since turning this option I haven't faced this issue anymore.
It was super annoying, as they kept muting me mid-sentence, but since turning this option I haven't faced this issue anymore.