Unwanted songs on my playlist

[Ellyndia]

Hi!

I have a small problem with Spotify on my phone. I'm a free user. When I want to listen to a specific artist (Chris Tilton, the Fringe Soundtrack albums), I can listen to 2 or 3 tracks of the album. Then Spotify locks me on an "suggestion title" which have nothing to do with the album (Maroon 5, Katy Perry, etc), and I can't switch these.

So to be clear :

I search Chris Tilton

I go to his albums

I choose one (Fringe Season 1 Soundtrack for example)

The first 2 or 3 songs are okay

Then I suddenly encounter a random Katy Perry

Then no way to come back to my Soundtrack

Could someone help me please? I have this issue only with these particular albums, no problem with other artists. Have I missed some rule?

Thank you very much for all the help you can give me,

Lea