How to stop "Are you still there?" modal opening

I use Teams on the web

If I navigate away from the window and come back I often have a "Are you still there?" modal window slap bang in the middle of the window. Selecting "I'm back" resets the whole window, which is highly intrusive, as I normally have one window to look at a file I'm using when working, and another to do some actually chatting with the rest of the team about that work.

Today I was in the meeting, had to drop off a message off in another window, and I couldn't interact with the meeting as this modal has decided to impose itself on me.

I don't require it, and just gets in the way, so can anybody tell me how to stop it appearing?

Thanks