Google's Gary Illyes has explained a little-known behavior: when a very important page suddenly starts returning a 4xx error, Google Search can "temporarily protect the URL from falling out of the index right away." That sounds like a safety net, but the details show why you shouldn't count on it.
What happened
The website of the VLC media player was still showing in Google, but without its favicon. Search Engine Roundtable reported on November 5, 2026 that Illyes explained why in a LinkedIn comment: VLC's site had been serving a 418 ("I'm a teapot") status code. According to Roundtable, Google treats that like most other 4xx errors, which Illyes described as "basically 'not found.'"
Normally, that means the page drops out of the index. But Illyes wrote that because VLC is "arguably one of the most important pages on the internet," Search can temporarily protect the URL from falling out of the index right away.
There was a cost:
VLC's site now returns 200 OK with content again, and Illyes said this "should sort itself out soon." He did not explain how Google decides a page is that important. Roundtable suggested that searches for the site by name may play a part, but that is the reporter's guess, not Google's statement.
How this fits with Google's documentation
Google's official HTTP status code guide still says that URLs already in the index that return a 4xx code are removed from the index, and that all 4xx errors except 429 are treated the same. It also notes that exotic codes like 418 aren't covered. Illyes didn't say how long the protection lasts or how Google decides a page is "important." For an ordinary small business site, assume the documented behavior applies: a 4xx can take the page out of the index.
What to do
- If a page loses its snippet or favicon but still shows in Google, check the status code first. Use URL Inspection in Search Console (run a live test) to see what Googlebot actually gets, not just what your browser shows.
- Watch status codes on your key pages, like your homepage, top product or service pages, and contact page. A rank tracker may still show the page while it is in this "protected" state, so check the status code itself.
- Check your firewall, CDN and bot-protection settings. Security rules can serve errors to crawlers only, which you won't notice as a visitor.
- Fix fast, then expect a short delay. Google needs to recrawl the page and get a 200 again before the snippet and favicon can come back.
- Don't plan around this. Illyes described it as temporary and tied it to an exceptionally important site.
Catch status code problems early
Broken status codes on important pages are easy to miss. SEOSFT's Indexability check, part of the free plan, lists every crawled page that returns a 4xx or 5xx error and flags an error on the homepage as critical. Our crawler does not identify itself as Googlebot, so it cannot see errors that a firewall serves only to Googlebot. For that, use URL Inspection.
Sources
- Search Engine Roundtable, Google Can Temporarily Protect Important URLs From Being Deindexed (Nov 5, 2026): https://www.seroundtable.com/google-protected-important-urls-index-42464.html
- Google Crawling Infrastructure, How HTTP status codes affect Google's crawlers: https://developers.google.com/crawling/docs/troubleshooting/http-status-codes