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

[Lekodm]

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.

latest.log

[SpaceWalkerRS]

Thanks for the report! A fix is available in the latest 0.21 alpha version (0.21.0-alpha.26). I'll leave the issue open until 0.21 is released.