In the Spotify app on your device, click on the SETTINGS (SMALL COGWHEEL), then scroll down the list until you see NAVIGATION. put all switches to off.
This issue has still not been resolved. This is dangerous and distracting as the music does not often start before I have set off driving . My techy Godson looked up the issue and suggests it is a bigger problem and that some have said you need to download another app to disable this function. This is rediculous samsung. Please find a better fix 🙏