stuck on optimizing for serp features

Which features are you going after? Worth checking first, because a few of them aren't really available anymore. FAQ rich results are now only shown for a small set of authoritative government and health sites, and HowTo rich results were dropped. If that's what you were working towards, that alone would explain it flattening. What still responds to work: - featured snippets / people also ask: a question as a heading, a direct 40-60 word answer straight under it, then detail. Lists and tables for list and comparison queries - product, review and breadcrumb schema where it genuinely fits the page - image packs: proper alt text and the image near the relevant copy Also, snippets move around a lot. Winning one for two weeks and losing it is normal, it doesn't mean the change was wrong.