Why the same playlist has different songs between iPhone and Mac

[fdefilippi]

Good mornign,

Today i was listening to a song on my mac (where i use a normal account), i went to chek out the playlist https://open.spotify.com/user/216v6whnadv3dx6y34obvvnkq/playlist/7jjlQrhRmWBcBugpThbVVx . I looked for it on my iPhone, that i use with a premium account, but some songs where not shown. Does anyone know why is this happening?

Thank you