Snippet from Debussy's Sarabande from Pour Piano (measures 38-39)
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble|Visibility:Never
|Key|Signature:F#,C#,G#,D#|Visibility:Never
|Chord|Dur:8th|Pos:-1,1,2,4|Opts:Stem=Down,Beam=First
|Chord|Dur:8th,Slur|Pos:5,6,8,10|Opts:Stem=Down,Beam=End
|Bar
|Chord|Dur:8th,Slur|Pos:3,4,6,8|Opts:Stem=Down,Beam=First
|Chord|Dur:8th,Slur|Pos:2,4,5,7|Opts:Stem=Down,Beam
|Chord|Dur:8th,Slur|Pos:0,2,3,5|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:-1,1,2,4|Opts:Stem=Down,Beam=End
!NoteWorthyComposerClip-End
NWC starts and ends the slur too far to the left. The attachment is Alfred Publishing's Masterwork Edition of Debussy selected favorites for the piano. I have found some examples where the slur starts/ends at the stem, (but none before the stem), The usual practice is the center of the notehead closest to the slur. This behaviour is also in NWC 1.75b.
Unlike some other slur problems, this one should be easy to fix.