Hi Rosie_Riviter,
Thank you for using the Apple Support Communities! Is this only occurring with a few songs? If so, try to remove those songs from your iPhone and re-add them, does the issue continue? Also, if you haven't already we would recommend restarting your iPhone which can often help. To restart, please follow the steps below:
1. Press and hold either volume button and the side button until the power-off slider appears.
2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo.
If the issue continues, we recommend that you reach out to Apple Support directly to take a further look. Please reach out here:
Apple Support
Hope this helps!
Have a great day.