Issue description: The jetpack, free runners, scuba tank, and gas mask are invisble on the player model in inventory and F5 view as well as on other players while using optifine. This may be entirely optifines fault and nothinig you can do until optifine 1.15.2 is updated past pre-release so sorry for bothering you but I thought I'd mention it in case there is something you can do.

Steps to reproduce:

1. Start game with mekanism, mek gen, mek tools, optifine
2. Put on any of the above listed items
3. Item is invisble on the player model

Forge: 1.15.2 - 31.1.74
Mekanism: 1.15.2 - 9.10.5.418
Other relevant version: optifine 1.15.2 - G1-Pre16

Report it to optifine they are probably breaking something. Even once optifine releases that won't help us track it down due to how optifine works and it being closed source.