Disable autoplay in "Music" on MacOS

Here is a workaround. When the silly thing starts playing a song, click on the repeat button to get it to "repeat 1" track. Then click on the upper right hand menu to bring up the "Playing Next/History" pane. On the playing next pane you should see the same track repeated many times. Scroll to the bottom and click "clear list."

Sometimes this causes the Music app to freeze. This is good because it will force Apple to fix it.

:-)