When inserting a half note or whole note below / above a quarter rest, the stems have to be alternated up / down or it will not accept the entry. I don't believe it is supposed to be that way.
!NoteWorthyComposerClip(2.0,Single)
|RestChord|Dur:4th,Slur|Opts:Stem=Up,ArticulationsOnStem|Dur2:Half|Pos2:-4
|Chord|Dur:4th,Slur|Pos:-11,-8,-6|Opts:Stem=Up
|RestChord|Dur:4th,Slur|Opts:Stem=Down,ArticulationsOnStem|Dur2:Half|Pos2:-2
|Chord|Dur:4th,Slur|Pos:-9,-6,-4|Opts:Stem=Down
|Bar
|Note|Dur:4th,Slur|Pos:-3
|Chord|Dur:4th,Slur|Pos:-8,-6,-4
|Note|Dur:4th,Slur|Pos:-6
|Chord|Dur:4th,Slur|Pos:-12,-9,-7
|Bar
|RestChord|Dur:4th|Opts:Stem=Up,ArticulationsOnStem|Dur2:Whole|Pos2:-6
!NoteWorthyComposerClip-End
Thanks