Problem

[Maz1623]

I've had 2 new up dates on my s20, now I'm not receiving notifications on messenger, WhatsApp and others.

[BandOfBrothers]

Sorry to hear this @Maz1623 

There are a few existing threads on the forum with tips in them with regards to such notifications issues which may help.

Just type in WhatsApp Notifications into the search bar on the forum.

Also do check your phone's notifications section and that of the app itself.

Some generic troubleshooting guides are >

Make sure the apps are updated in your Playstore and Galaxy Store.

Tryba soft reboot by turning the phone Off and On 

Clear Cache Files from the phone's System Partition Section  > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too. 

If I can be of any further help then please don't hesitate. Take care.  😎 

[Aminah]

Same problem for me. And I have already done the clear partition. The notifications come to the phone but they aren't shown in the tray or status bar until the phone is restarted. But it keeps happening randomly every few hours and the phone had to be restarted again