Starting in Android 8.0 (API level 26), all notifications MUST be assigned to a channel. Disabling Low Priority Notifications channel will prevent unimportant notifications from appear in the notification bar.

Please check Low Priority Notifications channel is disabled

Go to phone Settings / Apps / Choose our app

phone Settings

 

Tap App notifications

App notifications

 

Move the switch to the left until it turns gray

SEE MORE

Permissions

Battery Optimization

Do Not Disturb

Low Priority Notification Chanel

Third Party Apps

Unrestricted Data Access

Avatar of Michael Ginzburg

Full circle of mobile (android) app development (Idea, Spec, Design, Interface, usability evaluation, App Marketing, ,App ASO). Market Research, Keyword Research and Analysis, SEO expert