As of build 893, built a week ago TiC compat is broken and causes all "Weapons" to not render, the same is true in the latest, 906 (what I am using). Disabling compat fixes it as expected.

This is the commit which changed the renderer:
SlimeKnights/TinkersConstruct@075b769

Has TiC got a build server? I can't find any builds over 858.

On Prog's jenkins, https://dvs1.progwml6.com/jenkins/