Mystery notification sound

[Shuka]

Hello I've got a annoying notification sound suddenly appeared, it started yesterday (18/12/23), there is nothing showing on my screen. It only started after the system updated it self. Any help much appreciated 

[Drabbs67]

I have exactly the same problem. The sound is not my call tone, nor is it my notification tone. I've checked my notification history and there is nothing there which corresponds with when this happens. It is happening more often today. Any help would be much appreciated please.

[Drabbs67]

Just found a suggestion which I tried 2 hours ago and so far, so good.

Clear cache of Facebook, messenger and IG.
Clear data from all the meta services in apps.

[lance78]

Here's me phoned Samsung about fb notifications NOT WORKING guy said its not my phone it's fb account I've had to delete my account twice already just to try and get them to work I factory phone reset , cleared data, cash all system cash went through all fb settings still don't work all I want is a notification when a friend updates post on fb a53 5g user