Open Apple Music
Play a song
Tap the Now Playing bar
Tap the Up Next icon
Turn off Autoplay
On iPhone or iPad, tap the Autoplay button so it is no longer highlighted
On Mac, click the Autoplay button in the Up Next queue to turn it off
On Windows, open the queue and disable Autoplay if it is enabled
If using Crossfade, go to Settings
Tap Music
Tap Audio
Turn off Crossfade if you want to stop automatic song blending