Playing music after playlist queue is emptied

v3.886 running on a Raspberry Pi v4

I listened to several albums loaded from my Windows share on my ethernet network.
After each album, I cleared the queue.
When I was done nd ceared the queue the last time, I went t bed.
A short time later I could hear a song being played so went to investigate, it was the 1st track from the first album I listened to that evening.
The display showed nothing was being played and the queue was empty.
I restarted the RPi and everything was reset as expected.

Very strange.
Can anyone explain what might have happened here?

Spooky! I’ve never had this, but the mystery is unlikely to be solved without logs, which will show the queue activity.

http://logs.volumio.org/volumio/EHOY1NR.html

Probably not the cause, but under Sources, check the SuperSearch and Infinity Playback isn’t turned on at the bottom of that page.