I'm using FGU.
All I'm doing is creating a dice pool, making sure the eye to the right has a line through it, and making a roll.
I've also tried it with the eye having no line through it, and then again with the line through it.
In all cases, the percentage die results will not show up, while the narrative die results will show up.
Is it possible you've got some add on that's really common but not part of the vanilla build? As far as I know the only mods I have on my system are ones connected to this project

