Group display issue

Hi,

Recently when I put objects in a group the colour doesn’t show. Below I’ve just put two random components and grouped them. I know they’re grouped because they move together when I drag them (so I’m assuming that means the function itself is still working) but there’s somehow an issue with the colour display.

I’ve tried removing all plugins and repairing Rhino but the problem’s still there. I’ve never played with preferences or anything else, so I’m wondering what the issue is? (Windows 10, Rhino up to date)

Thanks in advance.

Is it because Alpha channel is equals to 0 in your picture?

Oh! Wow I’m such an idiot for not realizing something so simple. Thanks Antoine!