This is related.
When it is going from a non-grace note to another non-grace not, with grace note triplets in the middle, bad things can happen. For example:
!NoteWorthyComposerClip(2.0,Single)
|Note|Dur:16th,Dotted|Pos:2|Opts:Stem=Down,Beam=First
|Note|Dur:16th,Dotted|Pos:3|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:4
|Note|Dur:16th,Grace|Pos:3
|Note|Dur:8th,Dotted,Slur|Pos:4
|Note|Dur:16th,Grace|Pos:5
|Note|Dur:4th,Dotted,Slur|Pos:3
|Note|Dur:32nd,Triplet=First,Grace|Pos:2|Opts:Stem=Up,Beam=First
|Note|Dur:32nd,Triplet,Grace|Pos:3|Opts:Stem=Up,Beam
|Note|Dur:32nd,Triplet=End,Grace|Pos:4|Opts:Stem=Up,Beam
|Note|Dur:32nd,Triplet=First,Grace|Pos:3|Opts:Stem=Up,Beam
|Note|Dur:32nd,Triplet,Grace|Pos:2|Opts:Stem=Up,Beam
|Note|Dur:32nd,Triplet=End,Grace|Pos:3|Opts:Stem=Up,Beam=End
|Note|Dur:Half|Pos:2
!NoteWorthyComposerClip-End
The triplet caps shouldn't be pushed up. Of course, it's not that much of a problem, since grace note triplets don't affect sound much.
There are also many other problems, such as:
!NoteWorthyComposerClip(2.0,Single)
|Note|Dur:32nd,Grace,Slur|Pos:1|Opts:Stem=Up,Beam=First
|Note|Dur:32nd,Grace,Slur|Pos:2|Opts:Stem=Up,Beam
|Note|Dur:32nd,Grace,Slur|Pos:1|Opts:Stem=Up,Beam
|Note|Dur:32nd,Grace,Slur|Pos:0|Opts:Stem=Up,Beam
|Note|Dur:32nd,Grace,Slur|Pos:1|Opts:Stem=Up,Beam=End
|Note|Dur:8th,Slur|Pos:0|Opts:Stem=Down,Beam=First
|Note|Dur:16th,Slur|Pos:b-1|Opts:Stem=Down,Beam
|Note|Dur:16th|Pos:-2|Opts:Stem=Down,Beam=End
!NoteWorthyComposerClip-End
Try to get one continuous slur.