Ok, I may have discovered , at least in my case, the possible why…
I was looking through some other log files for foldersync, and it appears I had some music file changes that triggered a symfonium music DB update at the time I sent you that symfonium log.
Is it possible that as it refreshed the music library, even though the queue is still active ,(though not playing), it would require that queue to actually start again to get the widget refreshed?