Slash fill in percussion staves, voices 3 and 4
In normal melody staves, Edit > Tools > Fill With Slashes, if there are notes (or slashes) already in voices 1 and 2, will put slashes into voices 3 and 4. These are above or below the staff, and small, as expected.
However in a percussion staff in the same circumstances, voices 3 and 4 get small notes (as expected) but these notes have no stems. Is the lack of stems by design, or is this a bug?
If normal notes in voices 3 or 4 in a percussion staff are Toggled to Rhythmic Slash, they get stems.