My Note 8 just did an auto-update this morning and now I don't get visual or audible notifications until I unlock the screen.
Have you tried wiping the cache partition on your device?
Honestly I have no idea how to do that. And, all notifications started working correctly again today. Thank you
I am happy to hear it is now working! If you have any further concerns, please feel free to reach out again. We can always provide you with the steps for troubleshooting.