- Force guidance to None in forward() and _execute_model() to prevent ComfyUI-nunchaku's buggy code path (line 726) from executing
- Preserve legacy guidance values from kwargs/transformer_options and convert to additional_t_cond when needed (backward compatibility)
- This prevents TypeError: QwenTimestepProjEmbeddings.forward() takes 3 positional arguments but 4 were given
- Similar defensive approach to v2.0.2-v2.0.8 guidance duplication fixes
ussoewwin