Ties not correctly formed when adding an interval
The two bars were created firstly with the top notes tied together. Chord tones were then added to the first note which produces ties, although not yet having anything to tie to. Harmony notes were added to the second bar (same voice), but the ties do not extend to join them. The second chord also sounds, so is clearly not seen as tied.
This process seems to work correctly with notes other than whole notes.
I haven't attached an mscz because it seems repeatable behaviour.
(But V2 is a great improvement on V1 so far!)