A few days ago I got the S21 ultra and smart switched over from my S10.
From the get go I can't seem to get notifications from the Messenger app. I've tried every conceivable configuration of settings for both the messenger and FB app as well as the usual uninstall reinstall, log out log in, restart, make sure Do Not Disturbed not on etc.
I have to open the app itself and then my messages will update. Very frustrating as I'm missing loads of messages for work and family stuff.
What's almost most odd is maybe one in every 10 messages I will actually get a notification and I'll think it's fixed itself but then I won't get the next one.
Any help very much appreciated