I’ve noticed on my Prime Go, that when I enable the Hide Title/Artist setting, it starts to hide both the title, and the artist in the view while playing. However, after a short time, both show up again for one of the tracks first, and sometimes also the title and artist of the second track also show up again, as if the setting was not enabled. Disabling, and re-enabling the setting hides the track info again, but after some time it stops working again. Sometimes it does not even hide the info directly after loading the track. I started to notice the problem when I first got my Prime Go on Firmware 4.0.0, and after updating it to the latest one, 4.0.1, the issue persists.
Maybe you can add a video of it, than its easier to see the bug