This arXiv preprint (v1, May 2026) by Chung et al. directly rebuts Wiseman et al. (2026) by demonstrating that their reported negligible progenitor-age bias in Type Ia supernovae arises from methodological flaws. The analysis uses a combined SN Ia sample spanning 0.04 < z < 0.42 where mean host-galaxy age evolves by ~3 Gyr, artificially flattening the host-age-Hubble residual slope through redshift mixing prior to regression. Pantheon+ mass-step corrections are shown to further suppress this slope while relying on dust models incompatible with observed galaxy attenuation curves. Robustness is tested via multiple delay-time distributions for SN Ia progenitors, confirming the age-bias correction from Son et al. (2025) remains stable. When consistently paired with redshift-dependent magnitude adjustments, cosmological inferences show minimal change. This work highlights how unaccounted host evolution can bias evidence for acceleration, with implications for Lambda-CDM and fundamental physics alternatives. Methodology relies on regression re-analysis and cross-checks against empirical dust data rather than new observations (sample effectively reprocessed from existing catalogs). Limitations include dependence on assumed star-formation histories and lack of direct progenitor age measurements.