I changed the 'Dal Segno' to 'Dal Segno to Coda' , inserted a 'To Coda' at the end of measure 15 and a 'Coda' at the start of measure 20.
That solved the problem (don't ask me why)!
!NoteWorthyComposerClip(2.751,Single)
|Clef|Type:Treble
|Key|Signature:F#,C#,G#|Tonic:A
|TimeSig|Signature:4/4
|Rest|Dur:Half
|Rest|Dur:4th
|Tempo|Tempo:73|Pos:12
|Rest|Dur:8th
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Bar|Style:MasterRepeatOpen
|Note|Dur:4th|Pos:-4^
|Note|Dur:16th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-4|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Note|Dur:4th|Pos:-4
|Rest|Dur:8th
|Note|Dur:16th|Pos:-6^|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-6|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:-3|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-6^|Opts:Stem=Up,Beam=End
|Note|Dur:4th|Pos:-6
|Rest|Dur:8th,Dotted
|Note|Dur:16th|Pos:-4
|Bar
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam=End
|Note|Dur:4th|Pos:-4
|Note|Dur:8th|Pos:-6|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-3^|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:4th|Pos:-3
|Rest|Dur:4th
|Rest|Dur:4th
|Rest|Dur:8th
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:4th|Pos:-4
|Rest|Dur:8th
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Note|Dur:4th|Pos:-4
|Rest|Dur:8th
|Note|Dur:16th|Pos:-6^|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-6|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-3|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-6^|Opts:Stem=Up,Beam=End
|Note|Dur:4th|Pos:-6
|Rest|Dur:8th
|Note|Dur:16th|Pos:-3|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam=End
|Note|Dur:4th|Pos:-3
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-3^|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:4th|Pos:-3
|Rest|Dur:4th
|Rest|Dur:8th
|Note|Dur:8th|Pos:-4
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Flow|Style:Segno|Pos:10|Wide:Y
|Text|Text:"Chorus"|Font:StaffItalic|Pos:11
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th|Pos:-1^
|Note|Dur:4th|Pos:-1
|Rest|Dur:8th
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=End
|Rest|Dur:8th
|Note|Dur:8th|Pos:-4
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th|Pos:-1^
|Note|Dur:4th|Pos:-1
|Rest|Dur:8th
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=End
|Rest|Dur:8th
|Note|Dur:8th|Pos:-4
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:Half|Pos:0
|Rest|Dur:8th
|Note|Dur:8th|Pos:-4
|Note|Dur:8th,Dotted|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:Half|Pos:0
|Rest|Dur:8th
|Note|Dur:8th|Pos:1
|Note|Dur:8th|Pos:0|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Flow|Style:ToCoda|Pos:10|Wide:Y
|Bar
|Ending|Endings:1
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th,Slur|Pos:-1^
|Note|Dur:4th,Slur|Pos:-1
|Note|Dur:4th,Slur|Pos:-2
|Bar
|Ending|ClosedBracket:Y
|Note|Dur:Half|Pos:-3
|Rest|Dur:4th
|Rest|Dur:8th
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Bar|Style:MasterRepeatClose
|Ending|Endings:2
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th,Slur|Pos:-1^
|Note|Dur:4th,Slur|Pos:-1
|Note|Dur:4th,Slur|Pos:-2
|Bar
|Ending|ClosedBracket:Y
|Note|Dur:Half|Pos:-3
|Rest|Dur:8th
|Note|Dur:8th|Pos:-4
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Flow|Style:DSalCoda|Pos:12|Wide:Y
|Bar|Style:MasterRepeatClose
|Flow|Style:Coda|Pos:12|Wide:Y
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th,Slur|Pos:-1^
|Note|Dur:4th,Slur|Pos:-1
|Note|Dur:4th,Slur|Pos:-2
|Bar
|Note|Dur:Half|Pos:-3
|Rest|Dur:Half
|Bar
|Rest|Dur:Whole
|Bar
|Text|Text:"Instr."|Font:StaffItalic|Pos:8
|Rest|Dur:Whole
|Bar|Style:MasterRepeatOpen
|Text|Text:"[Bridge]"|Font:StaffItalic|Pos:8
|Note|Dur:4th|Pos:2
|Note|Dur:4th|Pos:1
|Note|Dur:4th|Pos:0
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:4th|Pos:2
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:0|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:0
|Rest|Dur:8th
|Note|Dur:8th|Pos:-1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:3|Opts:Stem=Down,Beam=End
|Bar
|Note|Dur:4th|Pos:2
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:0|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:0|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:8th|Pos:2|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:2|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:0|Opts:Stem=Down,Beam=End
|Rest|Dur:8th
|Note|Dur:8th|Pos:-1
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:0|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:Half|Pos:0
|Rest|Dur:8th
|Note|Dur:8th|Pos:-1
|Note|Dur:8th,Dotted|Pos:-1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:0|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:Half|Pos:0
|Rest|Dur:16th
|Note|Dur:16th|Pos:-1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:0|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Ending|Endings:1
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th,Slur|Pos:-1
|Note|Dur:Half|Pos:-1
|Bar
|Ending|ClosedBracket:Y
|Rest|Dur:Whole|Opts:Stem=Down
|Bar|Style:MasterRepeatClose
|Ending|Endings:2
|Ending|ClosedBracket:Y
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th,Slur|Pos:-1
|Note|Dur:Half|Pos:-1
|Bar
|Rest|Dur:Half|Opts:Stem=Down
|Rest|Dur:16th
|Note|Dur:16th|Pos:-1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:0|Opts:Stem=Up,Beam=First
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=End
|Bar
|Note|Dur:4th,Dotted|Pos:0
|Note|Dur:8th,Slur|Pos:-1
|TempoVariance|Style:Fermata|Pause:2|Pos:9|Justify:Center|Placement:AtNextNote
|Note|Dur:Half|Pos:-1
!NoteWorthyComposerClip-End