Windows notifications go quiet only during a game: check Do Not Disturb
If Windows banners appear on the desktop but stop when a game opens, check the notification center before assuming the messaging app went offline.
Read the setting
Windows 11 can turn on Do Not Disturb automatically during games, full-screen apps or display duplication. Read the enabled conditions in System > Notifications. Compare the game condition with the notification center after the game closes.
Compare a specific example
For example, a timer notification is visible in the notification center but no banner appeared while a card game was full screen. Its presence shows that Windows recorded the notification. Compare with a separate test from the same app after leaving the game. If the notification never appears in either condition, investigate app-level delivery next.
Frequently asked question
Can I keep Do Not Disturb and allow an important app?
Microsoft documents priority notifications. Review what is already allowed before deciding whether a specific app belongs there.