Quickly doing Alt+Tab when the game starts keeps the app running on the background and even detecting input, playing music and so on.
I’m using MonoGame 18.104.22.1682.
Seems that the IsActive property is not updated if you quickly switch to another app while the game is about to start.
In addition, it also happens when switichng several times while the game is running. Seems that doing it quickly make it fail sometimes.