I’m wondering if there’s an option preventing this kind of situation :
No, I don’t think there is. It’s unusual for a barline to continue directly beyond the bottom staff of the piano like this, though I daresay you have your reasons for doing it! But because it’s unusual Dorico doesn’t have any built-in intelligence for that specific situation.
Hi Daniel, thanks for your answer.
For sure it is unconventional for piano but it could happen more often with the vibraphone in a group of percussions for instance. Hope this feature could be added in the engraving options.