Expected Behavior

Signs should render when being carried

Actual Behavior

Local view shows weird wooden block, view from other users on server shows air.

Steps to Reproduce

Pick up a sign

Version of Minecraft, Carry On, Forge

1.12.2, 1.7, 14.23.1.2555

Screenshots encouraged

Later maybe, debugging a modpack

I don't believe this is possible without a complicated custom render.

Yep, what @capnkirok said.