Not receiving notification when phone is locked

[Android Central Question]

Hi, I have Galaxy s21 ultra 5g.
A few days ago my notifications on some apps stopped making sound and stopped showing on the lock screen. They will come after 20-25 min or when I unlock my phone.
Viber, Telegram, and Facebook messenger is working normally, but Yahoo mail, Gmail, and Steam just don't make any sound.
All of the apps are selected to show content on lock screen and they were working fine 2 days ago. Also, I made the recent updates and still nothing
Pls help, Thanks

 

[B. Diddy]

Welcome to Android Central! See this thread: https://forums.androidcentral.com/s...tions-when-phone-lock-screen.html#post7055648

Please register on this forum, which will allow you to engage in discussion more easily, as well as post images. https://forums.androidcentral.com/ask-question/409154-join-android-central-community.html