Google confirms a search ranking bug where sites disappear from search results over the weekend

"We're aware of a very narrow issue that caused temporary fluctuations in search results for a small number of websites. The issue has since been resolved, and the sites should no longer be seeing its effects," a Google spokesperson told Search Engine Land. https://searchengineland.com/google-confirms-a-search-ranking-bug-where-sites-disappear-from-search-results-over-the-weekend-436768