diff --git a/Kernel/Output/HTML/Layout.pm b/Kernel/Output/HTML/Layout.pm
index d2dc55a3063..10a3b469bca 100644
--- a/Kernel/Output/HTML/Layout.pm
+++ b/Kernel/Output/HTML/Layout.pm
@@ -4733,13 +4733,10 @@ sub CustomerNavigationBar {
             );
 
             # run module
-            %NavBarModule = (
-                %NavBarModule,
-                $Object->Run(
-                    %Param,
-                    Config       => $Jobs{$Job},
-                    NavBarModule => \%NavBarModule || {},
-                ),
+            $Object->Run(
+                %Param,
+                Config       => $Jobs{$Job},
+                NavBarModule => \%NavBarModule || {},
             );
         }
     }
diff --git a/Kernel/Output/HTML/NavBar/CustomerTicketProcess.pm b/Kernel/Output/HTML/NavBar/CustomerTicketProcess.pm
index bd6bed966ad..ba9ee1b0782 100644
--- a/Kernel/Output/HTML/NavBar/CustomerTicketProcess.pm
+++ b/Kernel/Output/HTML/NavBar/CustomerTicketProcess.pm
@@ -131,15 +131,11 @@ sub Run {
     my $Priority   = sprintf( '%07d', $FrontendNavigationConfig->{'002-ProcessManagement'}->[0]->{Prio} );
 
     return if !$Param{NavBarModule};
-    my %Return = %{ $Param{NavBarModule} };
 
-    # remove CustomerTicketProcess from the TicketMenu
-    delete $Return{$NavBarName}->{$Priority};
-
-    # remove CustomerTicketProcess from the Menu if set outside of the TicketMenu, see bug #11393
+    # remove CustomerTicketProcess from the main menu
     delete $Param{NavBarModule}->{$Priority};
 
-    return ( Sub => \%Return );
+    return 1;
 }
 
 1;
diff --git a/var/httpd/htdocs/skins/Customer/default/css/Core.Control.css b/var/httpd/htdocs/skins/Customer/default/css/Core.Control.css
index 52b9b66f9d4..f371fea90cf 100644
--- a/var/httpd/htdocs/skins/Customer/default/css/Core.Control.css
+++ b/var/httpd/htdocs/skins/Customer/default/css/Core.Control.css
@@ -68,9 +68,9 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
 
 }*/
 
-/*#Navigation > ul > li:hover ul:not(:empty),
-#Navigation > ul > li a:focus + ul:not(:empty),*/
-#Navigation > ul > li ul.Expanded:not(:empty:blank) {
+#Navigation > ul > li:hover ul,
+#Navigation > ul > li a:focus + ul,
+#Navigation > ul > li ul.Expanded {
     display: block;
     z-index: 1000;
 }
@@ -157,9 +157,6 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
     cursor: pointer;
 }
 
-#Navigation > ul > li > ul li:last-child {
-}
-
 #Navigation > ul > li > ul a:hover,
 #Navigation > ul > li > ul a:focus,
 #Navigation > ul > li > ul a.SubSelected {
@@ -180,9 +177,6 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
     white-space: normal;
 }
 
-#Navigation li:active {
-}
-
 #Navigation .Selected + li {
     margin-left: -1px;
 }
@@ -191,12 +185,6 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
     padding-left: 10px;
 }
 
-#Navigation .Selected,
-#Navigation .Selected:active,
-#Navigation > ul > li:hover {
-
-}
-
 #Navigation > ul > li > a::after {
     content: "";
     width: 100%;
@@ -287,9 +275,10 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
         border-radius: 0;
     }
 
-    #Navigation > ul.menuItems > .Selected a, 
-    #Navigation > ul.menuItems > li:focus a, 
-    #Navigation > ul.menuItems > li:hover a {
+    #Navigation > ul.menuItems > .Selected a,
+    #Navigation > ul.menuItems > li:focus a,
+    #Navigation > ul.menuItems > li:hover > a,
+    #Navigation > ul.menuItems > li:hover > a ul a {
         background: var(--primary-color);
         color: var(--white);
     }
@@ -309,6 +298,7 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
 
     #Navigation > ul.menuItems > li > ul {
         display: flex;
+        flex-direction: column;
         position: relative;
         top: unset;
         left: unset;
@@ -319,11 +309,11 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
         padding: var(--padding-sm);
         border-radius: var(--border-radius-xs);
     }
-    
+
     .RTL #Navigation > ul.menuItems > li > ul {
         right: 1px;
     }
-    
+
     #Navigation > ul.menuItems > li > ul > li {
         font-size: 11px;
         line-height: 11px;
@@ -422,8 +412,8 @@ did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
     background-position: left;
 }
 
-.Filter li .Selected, 
-.Filter li .Selected:hover, 
+.Filter li .Selected,
+.Filter li .Selected:hover,
 .Filter li .Selected:active {
     background: none;
     position: relative;