Bug or coincident?

[Bäär]

It was yesterday, 8. October.2017 at around 21.00

I had a new ablum ("Thank You" from Meghan Trainor) added at around 11.00 in my B.E.A.M.E.R Playlist (164 songs). Then I started it ~21.00 and the playlist was in shuffle mode. But all of the Meghan Trainor album songs were queued in this playlist for next play. And I couldn't change it clicking on the autoplay button several times (that button left with the two hugging arrows).

What was happening there? Coincidence or Bug?

Kind regards

Robert