Bug with accidentals in cross-stave notation

Enter a phrase in the bottom stave of a grand staff that uses the same accidental twice in the same measure (ie. two E-flats, the second of which will not be shown with a flat), and use Ctrl+Shift+↑ to move a part including the second accidental up to the top stave. This second accidental will still be shown without the appropriate accidental symbol in the top stave. The reverse is also true; cross-stave notation can result in redundant accidentals, as shown in measure 2 of the attached file.