[BUG] Converter gets stuck at PostEffectShadersConverter1_21_2

literally the title of the bug is whats happening, i try to convert a pack and then it converts till posteffectshadersconverter and then js pauses ig? idk how to explain it, it just doesnt do anything past this.

<img width="833" height="462" alt="Image" src="https://github.com/user-attachments/assets/594eef10-6c9e-488e-a049-34d1d219b19a" />