I have installed the last update on my S20 and now I regret it so much.. there are several issues I have but the main ones are:
1. suddenly the phone is much slower
2. the notifications icons on the lock screen are all in the same colour
3. every time when I restart the phone after a shut down, I get the new messages notification icon on the lock screen, if I scroll down on the notification it shows the last 2 messages I got (that I already read and responded to the day before!). It also shows on the message app the number of new messages I have but obviously no new messages. So annoying...
You should always delete the phone's cache partition after an update. It clears out any leftover remnants that can interfere with operations. Always wait for the update to fully complete before doing so.
While clearing out the message app cache is good, my suggestion was to delete the phone's cache partition. To do this power down your phone. Restart by holding the power button and volume up key. When you see the Samsung logo appear on the screen, let go of both buttons. The phone will go into recovery mode. Use the volume keys to navigate to "wipe cache partition" and use the power key to select. Once selected, you will get a warning and asked to confirm. Again, navigate to "yes" with the volume button and select with the power button. It will take 1 second, then "restart" will be highlighted. Press the power button to restart. See if the issue persists.
