Bad spacing between clef and first note when hiding staves

cfa99c6ca4

1. Create a score with a flute and a Bb clarinet in C major
2. Add a line break after 4 measures
3. Add a quarter note in the flute on the second system at the beginning of the measure
4. Press i and hide the clarinet

Result : the note is too close from the clef.

Remarks: there is keysig segment but no keysig in this track since it's C major.