Problems with ottava in cross-staff voices
In a two-staff keyboard layout, if there are two voices in the upper staff, one of them a cross-staff voice originally belonging to the lower staff, the ottava sign applied to the first staff doesn't hold for the cross-staff voice. I'm not sure if this is a bug or it is intended, but it is not the expected behavior. The ottava should affect every single note present on the corresponding staff.
By the way, a similar problem does occur with accidentals.