As reported by Windows Latest, cumulative update KB4598291 arrived earlier this month as a fix for some of the features broken by the October 2020 Update, including the Alt-Tab apps switcher and Windows Credentials manager.
https://www.techspot.com/news/88556-new-windows-10-updates-causing-more-problems-than.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/88556-new-windows-10-updates-causing-more-problems-than.html?utm_source=dlvr.it&utm_medium=blogger