In first person view, the crossbow holosight appears normal. However, when in third person, the inside of the sight is completely white.
I've attached a .zip with two screenshots of the bug, but if for whatever reason they don't work, here they are:
http://i.imgur.com/HZ9vTgN.jpg
http://i.imgur.com/qrqKUst.jpg
{F32040}