MoonMath challenge
Fix broken pipeline
Find and fix a systemic sampling failure in a Self-Forcing AR video pipeline without retraining.
Pipeline: Self-Forcing AR video (arXiv:2506.08009), code at the SiFRiA branch wan2.1_1.3bAR. The relevant Hugging Face checkpoint is ik6626/self_forcing_trial, with expt_2_1_1_3b_ode and expt_2_1_1_3b_dmd.
The failure: a DMD sample for the Porsche prompt drives backward. It reproduces across prompts and seeds, so the bug is systemic.
Deliverable: identify the root cause, propose a concrete fix, and describe the implementation. No full retrain is required.