Emissive Arrow Rendering Glitch - What is happening to my arrows?

[nfurlow]

I am trying to use an Optifine format emissive textures pack to add emissive textures for the arrow models but instead of the expected behavior, a glitchy texture is shown. This glitched texture seems to be composed of a bunch of other tiny Minecraft textures.

To reproduce, install the following mods on Minecraft 1.21 and use an Optifine format emissive resource pack to modify the model of any arrows.

• Fabric Loader 0.16.2
• MoreMcmeta v1.21-4.4.7-fabric
• emissive-plugin-1.21-2.0.5-fabric

I initially found this using Emissive Vanilla Textures by nudiscoturkey (other emissive textures seemed fine) and also confirmed it with a custom pack that only adds emissive textures for arrows. Please let me know if I can provide any other information & thanks for your help in advance!

Screenshots showing the mentioned behavior for a spectral arrow and a regular arrow: