I've just spent a while getting an attribute's value to display in my HDA, which I've got working as either a detail and a point attrib. Feeling really proud of myself, I head off to UE and reimport my HDA only to see it displaying the full expression as a string

I can't find any mention of this in the docs/online, anyone know if it's a limitation? I only want to display a float, so I'm wondering if I could convert it elsewhere and just display the value?
Cheers!