Hi,
I've analyzed the log and see that Denon was playing file
D:\mp3-unextracted\2018-extract\01_abstract_vision_-_ibiza.mp3
and once it asked whole the file stream then it still reports status "PLAYING" and asked the whole file stream again.
Isn't there a REPEAT ONE button on the Denon receiver causing this?
Normally all other receivers reports PLAYING status while playing a file, but once it reads whole the file then it reports STOPPED.
We reacts on the PLAYING > STOPPED status change and our reaction is init playback of the next track in the row.
EDIT: I've re-opened
https://www.ventismedia.com/mantis/view.php?id=11412 and could implement another workaround once you are sure that there isn't any "REPEAT ONE" feature on the Denon enabled.
EDIT2: Workaround for Denon devices implemented in build 4.1.21.1867
1867 isn't created yet, just install 1866 and replace MediaMonkey.exe from 1866 by this one:
https://www.dropbox.com/s/u1v6qs8tliuil ... y.exe?dl=0
and report how it works.