Describe the bug
The sign models don't load at all, whether it be the generic sign.jem or the variant models. They do load in 1.21.4 but not 1.21. This wasn't an issue in previous versions for 1.21 like the last version of the mod I used before the latest: 2.1.3. The sign model is completely missing from the all models list as well.

List and link to broken resourcepacks
Any pack with sign models such as my own: No Z-Fighting & Stormilla

Screenshots
Screenshot showing sign.jem is absent from the all models list, all other sign variant models are absent as well.

Next screenshot shows 2.1.3 where sign.jem is present.

(please complete the following information):

• Minecraft Version: 1.21
• EMF version: 2.4.1
• ETF version: 6.2.9