Scrolling among staves with keyboard shortcut
0) Open the attached score.
1) Select with the mouse the silence on the lower staff of the first measure.
2) Press the keyboard shortcut to "go to higher pitched note on chord".
The first silence on the upper staff is selected, but the one that was previously selected still is, you end up with both of them selected instead of scrolling.
Notice that if notes (as opposed to silences) are involved, as on the second measure, then the keyboard shortcut works as one would expect.