According to iOS developer Jeff Johnson, even with the "Clear cookies and site data when you quit Chrome" setting enabled, not all of YouTube and Google Search data is deleted when you exit the browser. Exiting will clear Google's cookies, but site data remains stored. Johnson says the only workaround...
https://www.techspot.com/news/87224-chrome-privacy-bug-clears-website-data-cookies-except.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/87224-chrome-privacy-bug-clears-website-data-cookies-except.html?utm_source=dlvr.it&utm_medium=blogger