I am not aware that this was an issue in previous versions, but when I sort my library using the filters for "My Tags", I am successful, however when I try and get the same result by putting the same search terms (exactly) in either the "Find Books" search in my library or in the "Rule" search in collections I get no results. This is independent of the need for double quotes. An example is ⇒ My Tags:HebrewGrammar, HebrewGrammar is one of my commonly used tags.