Try this
Settings -> Apps & notifications --> Apps --> Spotify --> Notifications --> Playback and check allow notifications and select lock screen notifications: display
That's annoying. Still doesn't work...
@cake started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
spenceey
@cake
Try this
Settings -> Apps & notifications --> Apps --> Spotify --> Notifications --> Playback and check allow notifications and select lock screen notifications: display