Playlist "jumps"

Hello Burtonbartijn,

Thanks for choosing the Apple Support Communities. We would want to test this in safe mode to see if the issue persists. This will rule out any third party software or apps that may be affecting how your Mac operates.

How to use safe mode on your Mac - Apple Support

Please follow the steps according to your type of Mac.

Also, it may be a good idea to check out any available updates for your Mac.

Update macOS on Mac - Apple Support

1. "Before continuing, it's a good idea to back up your Mac.
2. From the Apple menu  in the corner of your screen, choose System Preferences.
3. Click Software Update in the System Preferences window. Can't find Software Update?
4. Software Update now checks for new software.

• If Software Update finds new software, click Update Now or Upgrade Now to install. You might be asked to restart or enter an administrator password.
• If Software Update says that your Mac is up to date, then no new software is currently available for your Mac model.

If your Mac starts up to an Apple logo or progress bar during installation

If an error occurs while updating or installing macOS

If you can't find Software Update

• If you don't see an item named Software Update in System Preferences, use Search in the corner of the window to search for “Software Update.” 
• If your version of macOS doesn't include Software Update, open the App Store app, which you can find in the Dock or your Applications folder. Click the Updates tab in the App Store to check for updates. 
• You can also use your web browser to find some macOS upgrades."

We hope this helps.

Cheers!