So to summarize the reason for the issues is that track six has title Overture “May Night” so there is nothing to indicate the name of the work, because of this to achieve consistency we derive the Movement and Work fields for all tracks from the Mb Works rather than from the track title
If we supported Work Aliases this would mean all movements and works on this release could have English/Latin script titles, although they may vary slightly from what is written on album cover.
Without this I’m trying to work if this is a case where we should allow SongKong to use works and movements derived from titles for the other tracks despite the failure for the one track, but I cannot work out a sensible rule that is going to work well for all releases