Hello there leylonso,
Thanks for posting here on the Apple Support Communities! This is a place where other Apple users can submit questions or respond to others to help lend a hand. Let's take a closer look as we do our best to provide some additional insight.
To get started, are these songs downloaded on your iPhone, or are they all being streamed? Also, if you go to Settings > Music, what is the Audio Quality set to? Is Dolby Atmos enabled?
Does this still happen if you reduce the quality or disable Dolby Atmos at all?
In the meantime, be sure to restart your device and check for any updates:
How to back up your iPhone, iPad, and iPod touch
Update your iPhone, iPad, or iPod touch
We hope this helps get you pointed in the right direction.
Take care.