Apple music

Welcome EloyGameno,

Thanks for using the Apple Support Communities! We understand that “Sync Library” is unexpectedly turning off by itself. Let’s take a look and see what we can do. We're happy to help!

First, let's make sure your device is fully up-to-date on software. If there is an update available, please make sure you backup your device prior to performing any software updates.

How to back up your iPhone, iPad, and iPod touch

Update your iPhone, iPad, or iPod touch

Let's also try to close your "Settings" and "Music" app.

How to force an app to close on your iPhone, iPad, or iPod touch

Lastly, let's restart your iPhone.

Restart your iPhone

Have a great day!