Cap Height issue with InDesign

I have a recurring issue with Glyphs / InDesign. I’m sure it’s something I’m not doing, but I can’t figure it out for the life of me.

I mostly use Glyphs to create fairly simple headline fonts. Often, but not always, when I export and test the font in InDesign I cannot align the first baseline to the cap height. It only shows the alignment to the ascender.

Any ideas on this would be hugely appreciated.