Radio based on Artist or Album plays the same songs over and over

[Martian]

If I select an artist or an album and start a radio a number of tracks are shown for that station, it states that more songs will be added as it goes along but it doesn't, it just loops the same songs over & over.

I've tried on different albums and artists, always the same

Using a Note4 with Android 6.0.1 and Spotify Premium casting to Google Cast

This is kind of a deal breaker for me, I want to set a station running and leave it for hours with a variety of songe (like I can get with Play Music).

Any ideas?