why Spotify is accessing my iTunes files in iPhone ?

[Arianator_nikhi]

I saved (Favorite Songs plyalist) some songs on Spotify

And I also have some songs on my iphone's Music app snyced from MacBook
Whenever I'm listening Favorite Songs plyalist shuffel on spotify and came across a song have same description as on my Music app, spotify start accessing my itunes file from iphone and start playing it.
For eg. if I have "Crying in the club by Camila" in my Favorite Songs plyalist and also in itunes music library of iphone, Spotify start plyaing song from iphone file not from online

This issue is detected when spotify played a song which has defective  file on my MacBook and iPhone, Every time when I came across such songs on spotify, spotify starts playing defective files from my iPhone