Online games are sensitive and require many factors to work fine altogether.

If the game does not identify a player as active, it sees them as absent. This can be any disconnection (losing a stable connection, switching to other apps, checking emails/notifications, and even going to the device's menu).
❕ Any of it leads to disconnection, and your game is interrupted.

Ensure the internet source is stable, and do not collapse/close the app during the active game to avoid game crashes.