Percussion Problem?

Score view
I have several percussion instruments assigned to one player and in previous scores it has all come out ok. Since the update to the latest version 4 I seem to be getting uneven staves when one instrument moves to another.

If you check Staff Spacing in Engrave mode, I would hazard a guess that one of those uneven staves has a red staff spacing offset.

Yes it has. How do I reset to normal spacing please?

Thanks Lillie have reset layout.