Pin to Second Screen: Toolbar Popping Up?

Hey everyone. We just updated our zoom control room for our virtual events (new Mac mini m4's with Sequoia) and we were running a show today and normally we will use the Dual Monitor setup and Pin Participants to second screen. 

We noticed however, that as the show went on, a tool bar (just a normal window toolbar) would appear randomly on the fullscreen of that Second Pin. 

I realized not too long ago, that the issue seems to be that whenever someone turns their camera on/off, this bar is popping up on all of the new Mac Mini's at the same time. 

@ZoomZoom @zoom need some help here to figure out what's causing this because it kind of ruins the effect when we're showing these pins on to the rest of the audience and a random bar pops up