Screen keeps getting replaced in meetings after "add spotlight"

[Elon_Watermelon]

Hello, I'm moderating my boss's meetings and I need an advice, let's call him John.

John is using two monitors and the meetings happen like this: John's screen is always Spotlight for everyone, the participants are on small screens and everyone is watching John. But when the participants start showing their work on cameras and I use "Add Spotlight" for some participant (that is, add participant's screen to John's screen - two big screens for everyone) for John it looks like the participant's screen becomes the main and big one, and his own screen disappears. And at that moment, when someone speaks, their screen becomes big for everyone. We use Spotlight for everyone to show John's screen, and everything is fine until I add another participant with "Add spotlight", which for some reason replaces John's screen (on his computer) and the automatic screen switching by voice somehow starts happening. I need to stop "Add spotlight" screen from replacing John's own screen on his computer and I need to find a way to remove the automatic screen switching by voice so that everything can be adjusted manually.

Does anyone have any ideas on how to handle this?

Thank you ❤️