Added failing test for #7777.

samples/IntegrationTestApp/MainWindow.axaml

@@ -83,6 +83,14 @@
               <MenuItem Name="OpenRecentMenu" Header="Open _Recent">
                 <MenuItem Name="OpenRecentFile1Menu" Header="File_1.txt"/>
               </MenuItem>
+              <Separator/>
+
+              <!-- Tests #7777 - must have the same access key as another toplevel menu -->
+              <MenuItem Header="_Hamburger"/>
+              
+            </MenuItem>
+            <MenuItem Header="_Help">
+              <MenuItem Header="_About"/>
             </MenuItem>
           </Menu>
           <StackPanel>

tests/Avalonia.IntegrationTests.Appium/MenuTests.cs

@@ -105,6 +105,18 @@ namespace Avalonia.IntegrationTests.Appium
             Assert.Equal("File_1.txt", clickedMenuItem.Text);
         }
 
+        [PlatformFact(SkipOnOSX = true)]
+        public void Select_Child_With_Alt_Access_Keys_When_TopLevel_Menu_Has_Same_AccessKey()
+        {
+            new Actions(_session)
+                .KeyDown(Keys.Alt).KeyUp(Keys.Alt)
+                .SendKeys("fh")
+                .Perform();
+
+            var clickedMenuItem = _session.FindElementByAccessibilityId("ClickedMenuItem");
+            Assert.Equal("_Hamburger", clickedMenuItem.Text);
+        }
+
         [PlatformFact(SkipOnOSX = true)]
         public void Select_Child_With_Click_Arrow_Keys()
         {