Linked tab staves go out of sync after adjusting notes in chord

To reproduce:
1. Create new score
2. In Create Instruments Dialogue:
- Add Classical Guitar with "traditional" staff
- Select "Add Linked Staff" and add "Tab. 6-str simple"
3. Enter a G5 chord into the traditional staff. We now have:

4. Now select the 'D' in the note in the traditional staff.
5. Either hit 'up arrow' followed by 'down arrow' OR 'shift up arrow' followed by 'shift down arrow'. We now have either:
- up/down

- shit+up/shift+down

Result: linked staves are now out of sync.

Produced on:
6ff5b...

This is also a bare minimum example. Some modifications can produce spectacularly out-of-sync results. Perhaps linked staves aren't meant to be edited this way, but it seemed like an obvious enough action for me to do.