[1.13.2] Entity shadow rendering artifact / shadow duplicating when OSL is installed

When running Minecraft 1.13.2 with Ornithe and Ornithe Standard Libraries (OSL), mob shadows duplicate and render in a repeating grid-like pattern beneath entities. Running clean Ornithe without OSL does not reproduce the issue.

<img width="1920" height="1200" alt="Image" src="https://github.com/user-attachments/assets/122144dd-ad1f-471d-af3f-2e52781d0c15" />

[latest.log](https://github.com/user-attachments/files/30715283/latest.log)

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[1.13.2] Entity shadow rendering artifact / shadow duplicating when OSL is installed #79

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[1.13.2] Entity shadow rendering artifact / shadow duplicating when OSL is installed #79

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