Hiding staves for Ossia also removes D.S. and tempo markings

I add an extra staff as first staff to make an Ossia (as described elsewhere). Then I create the Ossia and do Hide empty staves. This also removes D.S. signs and tempo markings. The same occurs when I hide e.g. the first measure of the Ossia staff manually.

I fixed it by positioning the Ossia on the second staff. Not common, but it works. It is something to consider when a real Ossia solution is made.