Shopify custom page meta title and description reverted after a theme or app update
You set a meta title and description on a custom page (About, a landing page), then a theme publish or an app reset it back to Shopify's default — or to an old value — without telling you. Page SEO fields live as metafields with no version history, so Shopify can't show you what changed and has no native undo.
If you didn't already have a backup, those old values are gone — Shopify keeps no history.
The steps below recover what you can. To make the next time a 1-click undo instead of hours of CSV work: a daily snapshot of every SEO field. Free to monitor, no card — and SEO Vault only reads your store unless you click restore.
Pin down what touched it: a theme publish, a page-template app, or an SEO app with a title/description template. Pause that app or hold off on more theme work first, or it re-applies its own version on the next run.
Re-enter the correct values under Online Store > Pages > [your page] > Search engine listing > Edit. Pages aren't in Shopify's native CSV export, so if you use Matrixify you can re-import the Title Tag and Meta Description columns from a pre-change export; otherwise this is manual.
Re-publish, then recheck the page a few hours later. If it flips back again, an app rule or theme template is still re-applying it on a schedule — disable that specific rule instead of re-editing on a loop.
Going forward, keep a daily snapshot of the meta title and description on every page (custom pages, not just products) so you're alerted the moment a theme or app resets them, with the likely culprit named, and can restore the right version in one click.
Source: Shopify Help Center: editing search engine listings; Shopify Community theme-migration / page SEO threads
SEO Vault keeps a daily snapshot of every SEO field on your store — meta titles, descriptions, alt-text, tags, handles (products AND collections) — and emails you the moment something changes in bulk, with the likely app responsible. One click restores yesterday's state, just the SEO fields. Free to monitor and get alerted; $14/mo for 1-click restore.