Staff label distance, full scores vs vocal scores

I am working on an opera. For the opera there is a full orchestral score and a piano-vocal score. I have both scores in the same Dorico project, since (obviously) the two books share all the vocal staves.

At this point in the project, I have formatted every page of the vocal score (~390 of ‘em), and I’m happy with the results. Now I’ve started to create new layouts for the full score.

I immediately saw a problem with the full score’s engraving of staff labels, they are too close to the brackets:

I changed the Engraving Option:

And that makes my full score layouts look fine. But it also changes the vocal score layouts, I suspect because they also include a piano bracket.

In the vocal score, I want this:

But after changing the setting to accommodate the full score layouts, I get this:

Believe it or not, that single-space difference affects the staff layout of several piano-vocal score layouts.

I am stuck here?

Thanks,

Greg

Greg, first of all, if you are happy with your local store (I mean vocal score), export it as Graphics/.pdf. Then make a copy of your main project file, go to the relevant Engraving Options and set them to Factory Default. How does the result look in Full Score and Vocal Score?
Sometimes these issues originate from a font issue? Have you changed or are you using a dedicated font for your project?
Another place you could check: does your Short Instrument Name “Abd. ” inadvertently have a space after its name?