Messenger notifications mute after 2 messages

[Rodrigo Magalhães]

Hey everyone.
I have a problem that i cant find solution anywhere
have a group chat with Friends in messenger and on my s8+ with Nougat when i received more than 2 or 3 messages and didnt open the App, it would automatically mute the App.
Ever since it updated do Oreo it wont mute. And sometimes its anoying to hear Messenger spam beeping.
I cant find anything about this anywhere. Please help

 

[KBU2]

Not sure which messager app you're using but in most cases if there's not a setting on the immediate app, You most likely have to go to your device settings then Apps and locate that messenger app then look for it's permissions or notifications and disable or enable it from there.

 

[Rodrigo Magalhães]

Its Facebook Messenger. And i know that i have to go to settings. But i cant find any setting for that. Tried everything