ok so there you go then?
if its not very popular, then its probably not gonna show up very often (if at all if you have a large library of other more popular music).
you can control the rating, obviously.
you can also control the radio repeat timer @ https://support.plex.tv/articles/201105343-advanced-hidden-server-settings/
RadioDaysSinceLastPlayed
integer
When playing a Radio or Smart Shuffle, Plex prefers to include tracks that have not been played recently. This sets that “recent” period (default is 2).
2
probably not a lot, as you have seen.
plex doesn’t use ‘track artists’ so, you generally won’t get a lot of tracks from ‘various artists’ unless the whole album genre/popularity/etc are close enough for the particular radio algorithm that is active.
Library radio is not just a straight shuffle.
If you want a straight shuffle, create a smart playlist that is always random @ [TIP] --- how to create an autoplaylist with random sort
There is also a server setting to disable some of the ‘smart’ shuffle stuff.
