I've updated my S20 phone and now when using Audible or BBC Sounds the app doesn't appear on the lock screen. I have unlock my phone and open the app to pause it, really annoying!
I was having this same issue, started about 2 weeks ago! I Uninstaller the updates to the clock app, which deleted all of my saved alarms, but it fixed it! My screen now wakes up when the alarm goes off instead of me having to unlock my phone to snooze or turn off the alarm!