Worked on the withastro/astro repository to address a critical bug affecting content collection integrity. Delivered a targeted fix that preserved native Map and Set objects during the updateImageReferencesInData process by switching from Traverse.map to Traverse.forEach after applying structuredClone. This approach ensured that native objects were not corrupted during data cloning, restoring stability to content pipelines and preventing rendering issues. The solution was implemented with a focus on regression safety and minimal code changes, utilizing TypeScript and JavaScript. Emphasized robust testing practices to validate the fix, ultimately reducing support overhead and maintaining reliable content rendering for downstream users.