I Received a new Aftershokz headset earlier this week.
Old Headset had no issue with Microsoft Teams.
However, During a meeting today, I was unpleasantly surprised by this Terrible double beep everyone is describing. My head is still spinning.
Terrible experience to have to present after listening to this noise.
The only temporary fix for me was what another user cited
'As stated above...long press on + and - on headset at same time and you will hear "Mute off" command. Now double tone is gone when I mute in MS Teams. Thanks BizUser123 for the tip'
However, Immediately after unmuting and muting, the noise continues.
But I least for now I can be muted long term without drawback.
I reached out to Aftershokz, I hope they help. Their customer experience was fantastic previously.