Preview Mesh Invisible When Attached To A Socket

Hello,

I’ve been having an issue lately where whenever I add a preview mesh to a socket (so it looks like a character is holding something) the mesh is invisible. It’s weird because when I tried it with a socket of another skeletal mesh, it worked fine. Any ideas?

(Skeleton where Preview Mesh is invisible in socket)

(Skeleton where Preview Mesh isn’t invisible in socket)