This usually happens when the player has installed desktop finishing tools (such as cheetah).

Or because of the use of 360 and other software, these software will start the game mode to optimize the operation when playing games.

In rare cases, other programs are set to stop in full screen and then changed to pause.

If none of the above methods can solve your problem, there is another trick-set the game to borderless window mode so that it will not stop running.