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

Mobile Enthusiast, SEO Strategist, Analyst, Researcher. Content Strategy and Writer, All Rolled Into One Mobile Apps Business Development, ASO, full Suite SEO, SEM, On-page, Off-page. Technical SEO, Competitors Analysis, Keyword Research+ more LinkedIn: @michaelginzburg64