The Signing-out use-case in the Docs states: "In the case where a visitor visits your website and is logged-in (User ID is set) then a visit will be created for this User ID. If then visitor logs out then the visitor has no User ID set any more and a new visit will be created on the page view right after logging out. (if User ID was not used then the requests would have been tracked into one visit and one unique visitor)."

This seems to be not the case. When a user logs out (User-Id will not be set at all (not even empty string) anymore after logging out), all actions are still attributed to the visitor that had the UserId set, if the action is within "visit_standard_length" (or window_look_back_for_visitor). After waiting for timeout of "visit_standard_length", a new visitor without UserId is created, which would be expected even within "visit_standard_length".