Alright. We will try to debug this and report here. Thanks for the effort!

Have left the player continuously playing tracks for an hour.

Attached images of all the settings, which are fine as far as I understand. Last item played is from yesterday.

As soon as I enable back the PanoScrobbler, it works fine. (so it's not a matter of network not working properly on my dap)

Try Two things: 

1) Check if the blacklist option shows your music players. You will find a floating action button on listen screen with a stop sign on it (Bottom right).

2) So there is a known issue that the first ever song played is not recorded, can you play more songs and then try.

Also we are aware of now playing being outdated and is not an issue of ListenService it self. Although we are obviously going to patch it.

Yes, all checked multiple times. Permission page appeared fine, and it was provided.

Also reset it manually and enabled it again without luck.

(I can provide screenshots if needed)

Can you please check if you given the app permission to access notifications? Our app seems to not take the user to the permission page sometimes and we are going to get it fixed soon.

To grant notification access permission: Go to settings -> Search for "notification access" -> Enable access for LB Android