Why does my flow isn't endless?

The whole premise of Flow is that it's an endless suggestion of songs, part from my favourites and part from the whole catalogue of likely songs that I might like. 

However, it's not endless, not even remotely and it turned into the feature I disliked in Spotify which made me choose Deezer over it in the first place, and that it has an end and basically turned into a playlist. 

I many times find myself having to force stop the app amd re-running flow, many times it starts playing new songs but I'm other times, it just start the "playlist" from the beginning and plays the same songs as the previous run in the same order and ends in the same place too. I'm that case, I need to delete the app's cache and data amd basically reset it so I could get a new flow.

It wasn't like this 1 or 2 years ago and it really bugs me because this is the feature that really made me stay with Deezer and not choose Spotify.