Space for instrument name of hidden staff is reserved
1. Create a score with 2 different instruments and 1 measure
2. Enter a note in the first staff
3. Remove the instrument name of the first staff
4. In Style: Hide empty staves
Only the first staff is visible and starts right at the left margin, because there is no instrument name visible
Only the first staff is visible but there is a gap at the left side of the width of the hidden staffs instrument name.