This is also the work from home experience.

“I was wondering how I was able to describe so much of the room without you lot interrupting me…”

In my experience it’s everyone else.

The DM uses their mic more than anyone else and may even have multiple groups. While it can happen, i mostly see it with new DMs and usually it isn’t a big deal.

I do agree i see this more in players. It happens maybe every session but im usually quick to call a player on it if it’s something like their turn in combat. Or a player was trying to roleplay with someone else’s PC followed by a few seconds of silence.

When the DM does it we usually notice because he’s normally quite talkative, as DMs tend to be. When a player does it we might not notice for five minutes…