Under below condition, the method ignores``this.useReferer``. I wonder if it is done on purpose. - ``isAlwaysUseDefaultTargetUrl()`` is false - ``this.targetUrlParameter`` is not null - ``request.getParameter(this.targetUrlParameter)`` is whitespace only Would anyone help to check? https://github.com/spring-projects/spring-security/blob/8aa7029d078cdad34b539cbe54e3c4fb8b961711/web/src/main/java/org/springframework/security/web/authentication/AbstractAuthenticationTargetUrlRequestHandler.java#L106-L135