Ossia staff labelling issue

Hi, I've created an ossia part by adding a stave and then selecting 'small stave' and cutaway options as recommended in the handbook.

My score has two parts - 'Soprano' and 'Alto/Tenor' (with lots of instrument changes to 'Sop+Alto' and 'Tenor'). My issue is that by adding an ossia stave to the soprano part, the soprano label is now shared between them which means the label is 'between' the visible and hidden stave and also in small font to match the upper ossia stave.

I'm looking for a properly aligned label for my Soprano part and no label for the ossia. I've attached the file for clarity.

Your help is much appreciated, thank you.