Shader rendertype_entity_translucent_emissive could not find sampler named Sampler2 in the specified shader program.

This is an ongoing bug with 1.21.x, in my case 1.21.1. Errors are as thus upon server startup.

[11Aug2025 19:12:23.980] [Render thread/WARN] [net.minecraft.client.renderer.ShaderInstance/]: Shader rendertype_entity_translucent_emissive could not find sampler named Sampler2 in the specified shader program.