It has nothing to do with the Edge itself. Full screen mode in Windows 10 that triggers ESET Gamer mode, turns on every time the user is switching between apps using Alt-Tab, Win-Tab, clicking on Task View icon on the Task bar etc. I assume dragging the tabs in Edge might be an action of the similar nature.
I believe the reason for this pop-up to appear all the time is due to changes to anti-virus software monitoring approach in Windows 10 compared to previous versions of Windows (at least, Win 7). One of the features of ESET Gamer mode (I suspect the postponing of virus signature updates) is recognized by Windows 10 anti-virus software monitoring as a potential problem. As a result, you get the notification about the problem. But when you click on that notification, Windows 10 turns off Full screen mode, ESET turns off Gamer mode, and you don’t see anything in response to your click/tap since the problem eliminates by itself.
For now, the workaround is to disable anti-virus software monitoring by Windows 10. But of course it’s not a solution, since Windows monitoring happens to be an additional level of protection and is very useful sometimes.
My understanding is that ESET developers should change the “anti-virus software status” for the Gamer mode that is provided to Windows 10 that way so Windows won’t think there’s something wrong with anti-virus. It is obvious that Microsoft won’t fix that since OS actions are relatively correct.
