Tested on a Mac Mini M2 using Sonoma 14.6.2b. Symptoms can be replicated n both Arc (1.49.0) and Google Chrome (125.0.6422.113).
Also tested on a Mac Mini (intel) using Catalina 10.15. Symptoms can be replicated in Google Chrome.
EXPECTED BEHAVIOR:
Selecting the song in a Playlist and pressing the Delete key should be the only way to remove a song from a Playlist. Since I could not find any reference to this in the BBMO Manual, perhaps it could be added in the next edition?
WHAT IS HAPPENING:
Double-clicking on a song in a Playlist makes the song disappear.