diff --git a/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/CDA.pm b/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/CDA.pm
index de634fff2..07f75795d 100644
--- a/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/CDA.pm
+++ b/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/CDA.pm
@@ -47,6 +47,10 @@ sub changeUrldc {
 
             $self->p->updateSession( $req, $cdaInfos, $cdaSession->id );
 
+            # We are about to redirect the user to the CDA application,
+            # dismiss any previously stored redirections (#1650)
+            delete $req->{pdata}->{_url};
+
             $req->{urldc} .=
                 ( $urldc =~ /\?/ ? '&' : '?' )
               . $self->{conf}->{cookieName} . "cda="
diff --git a/lemonldap-ng-portal/t/66-CDA-already-auth.t b/lemonldap-ng-portal/t/66-CDA-already-auth.t
index dab7d2a3e..2b605aa94 100644
--- a/lemonldap-ng-portal/t/66-CDA-already-auth.t
+++ b/lemonldap-ng-portal/t/66-CDA-already-auth.t
@@ -51,6 +51,12 @@ count(1);
 my ($query) =
   expectRedirection( $res, qr#^http://test.example.org/\?(lemonldapcda=.*)$# );
 
+# Bug #1650 made the portal store an _url in pdata at this step
+my $cookies = getCookies($res);
+
+ok( !defined( $cookies->{lemonldappdata} ), " Make sure no pdata is returned" );
+count(1);
+
 # Handler part
 use_ok('Lemonldap::NG::Handler::Server');
 use_ok('Lemonldap::NG::Common::PSGI::Cli::Lib');