Additional features, settings, or issues not covered by specific Microsoft Teams categories
I am having the same issue. I used to be able to use mute/unmute and answer/hang-up from my headset at anytime.
Now I can only use my mute controls if I initiate the mute from my headset. If I mute using the desktop app I can no longer use the unmute on my headset, I have to unmute from the desktop Teams app then I can mute and unmute using the headset again. Call answer and hang-up don't work at all.