diff --git a/app/components/work_packages/details/tab_component.html.erb b/app/components/work_packages/details/tab_component.html.erb
index b1ed9590c52e..4540ec5ef575 100644
--- a/app/components/work_packages/details/tab_component.html.erb
+++ b/app/components/work_packages/details/tab_component.html.erb
@@ -22,6 +22,7 @@
                                           href: work_package_path(work_package.id, full_screen_tab),
                                           target: "_top",
                                           scheme: :invisible,
+                                          test_selector: "wp-details-tab-component--full-screen",
                                           aria: { label: I18n.t("js.button_show_fullscreen") }))
     end
 
@@ -30,6 +31,7 @@
                                           tag: :a,
                                           href: url_helpers.send(base_route),
                                           scheme: :invisible,
+                                          test_selector: "wp-details-tab-component--close",
                                           aria: { label: I18n.t(:button_close) }))
     end
   end
diff --git a/app/components/work_packages/split_view_component.html.erb b/app/components/work_packages/split_view_component.html.erb
index 2d11e4c2816d..50d4b6128817 100644
--- a/app/components/work_packages/split_view_component.html.erb
+++ b/app/components/work_packages/split_view_component.html.erb
@@ -6,7 +6,7 @@
           render(Primer::Beta::Blankslate.new(spacious: true)) do |component|
             component.with_visual_icon(icon: :inbox)
             component.with_heading(tag: :h2).with_content(
-              I18n.t(:error_work_package_id_not_found, id: @id)
+              I18n.t(:error_work_package_id_not_found)
             )
           end
         end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 49086db85b15..581864ba56f0 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1688,7 +1688,7 @@ en:
   error_pdf_failed_to_export: "The PDF export could not be saved: %{error}"
   error_token_authenticity: "Unable to verify Cross-Site Request Forgery token. Did you try to submit data on multiple browsers or tabs? Please close all tabs and try again."
   error_work_package_not_found_in_project: "The work package was not found or does not belong to this project"
-  error_work_package_id_not_found: "The work package %{id} was not found."
+  error_work_package_id_not_found: "The work package was not found."
   error_must_be_project_member: "must be project member"
   error_migrations_are_pending: "Your OpenProject installation has pending database migrations. You have likely missed running the migrations on your last upgrade. Please check the upgrade guide to properly upgrade your installation."
   error_migrations_visit_upgrade_guides: "Please visit our upgrade guide documentation"
diff --git a/frontend/src/app/features/in-app-notifications/center/state/ian-center.service.ts b/frontend/src/app/features/in-app-notifications/center/state/ian-center.service.ts
index 0be6bd5d8774..c4a7bab5ac39 100644
--- a/frontend/src/app/features/in-app-notifications/center/state/ian-center.service.ts
+++ b/frontend/src/app/features/in-app-notifications/center/state/ian-center.service.ts
@@ -250,10 +250,7 @@ export class IanCenterService extends UntilDestroyedMixin {
       .pipe(take(1))
       .subscribe((notifications:INotification[][]) => {
         if (notifications.length <= 0) {
-          void this.state.go(
-            // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access,@typescript-eslint/restrict-template-expressions
-            `${this.state.current.data.baseRoute}`,
-          );
+          window.location.href = this.pathHelper.notificationsPath();
           return;
         }
         if (notifications[0][0]._links.resource || notifications[this.selectedNotificationIndex][0]._links.resource) {
@@ -322,7 +319,7 @@ export class IanCenterService extends UntilDestroyedMixin {
       },
     });
 
-    if (!this.deviceService.isMobile && this.state.includes('**.details.*')) {
+    if (!this.deviceService.isMobile && window.location.href.includes('details')) {
       this.showNextNotification();
     }
 
diff --git a/spec/features/notifications/navigation_spec.rb b/spec/features/notifications/navigation_spec.rb
index 911aecde3347..69438b1ad43d 100644
--- a/spec/features/notifications/navigation_spec.rb
+++ b/spec/features/notifications/navigation_spec.rb
@@ -49,9 +49,9 @@
 
       # Navigate to full view and back
       wp_full = split_screen.switch_to_fullscreen
-      expect(page).to have_current_path "/work_packages/#{work_package.id}/relations"
+      expect(page).to have_current_path "/projects/#{project.identifier}/work_packages/#{work_package.id}/relations"
 
-      wp_full.go_back
+      page.execute_script("window.history.back()")
       expect(page).to have_current_path "/notifications/details/#{work_package.id}/relations"
 
       # Close the split screen
@@ -63,7 +63,8 @@
   it "opening a notification that does not exist returns to the center" do
     visit "/notifications/details/0"
 
-    expect(page).to have_current_path "/notifications"
+    expect(page).to have_current_path "/notifications/details/0"
+    expect(page).to have_text "The work package was not found."
   end
 
   it "deep linking to a notification details highlights it" do
diff --git a/spec/features/notifications/notification_center/split_screen_spec.rb b/spec/features/notifications/notification_center/split_screen_spec.rb
index b9f97a51eeb1..f90aab591abb 100644
--- a/spec/features/notifications/notification_center/split_screen_spec.rb
+++ b/spec/features/notifications/notification_center/split_screen_spec.rb
@@ -75,7 +75,7 @@
       wp_full = split_screen.switch_to_fullscreen
       wp_full.expect_tab :relations
 
-      wp_full.go_back
+      page.execute_script("window.history.back()")
       split_screen.expect_tab :relations
 
       # The split screen can be closed
diff --git a/spec/support/pages/work_packages/primerized_split_work_package.rb b/spec/support/pages/work_packages/primerized_split_work_package.rb
index cd27ed032045..0d8da170c6a9 100644
--- a/spec/support/pages/work_packages/primerized_split_work_package.rb
+++ b/spec/support/pages/work_packages/primerized_split_work_package.rb
@@ -36,12 +36,21 @@ def in_split_view(&)
 
     def switch_to_tab(tab:)
       in_split_view do
-        click_link_or_button tab
+        page.find_test_selector(tab_selector(tab)).click
       end
     end
 
+    def switch_to_fullscreen
+      page.find_test_selector("wp-details-tab-component--full-screen").click
+      FullWorkPackage.new(work_package, project)
+    end
+
+    def close
+      page.find_test_selector("wp-details-tab-component--close").click
+    end
+
     def expect_tab(tab)
-      within_test_selector("wp-details-tab-component--tab-#{tab.downcase}") do |link|
+      within_test_selector(tab_selector(tab)) do |link|
         link["data-aria-current"] == "page"
       end
     end
@@ -49,5 +58,11 @@ def expect_tab(tab)
     def within_active_tab(&)
       within(".work-packages--details-content", &)
     end
+
+    private
+
+    def tab_selector(tab)
+      "wp-details-tab-component--tab-#{tab.downcase}"
+    end
   end
 end