I see here: http://moodeaudio.org/forum/showthread.p...6#pid10196 you were using 0.21.6 version with moOde 5.0.
So i recommend to do the test with moOde 5.0 and MPD 0.20.20.
Other music player with MPD could use older MPD version, i believe Volumio used a 0.19 version.
For me the NAS create the .mpdignore files in his indexing folders (like that, mpd ignore those folders when scanning), but with 0.20.21, format of those files change a bit, so it explain the presence of errors in the logs, MPD 0.20.21 can not read them anymore because of that change.
So i recommend to do the test with moOde 5.0 and MPD 0.20.20.
Other music player with MPD could use older MPD version, i believe Volumio used a 0.19 version.
For me the NAS create the .mpdignore files in his indexing folders (like that, mpd ignore those folders when scanning), but with 0.20.21, format of those files change a bit, so it explain the presence of errors in the logs, MPD 0.20.21 can not read them anymore because of that change.