Page API submenu that overrides parent route failure

[DaWolfey]

• Themosis Version: 2.0.5
• WordPress Version: 5.3.2
• PHP Version: 7.3.0

Description

In Wordpress if I have multiple sub pages using add_submenu_page, but the first one has the same menu_slug as the parent (so the menu_slug and the parent_slug values are identical), this causes Wordpress to remove the duplicate of the parent that would appear in the sub menu (this is documented, it's not some weird hack).

If I do the same thing with Page::make, the duplicate submenu is removed as expected, but every submenu page after the first does not obey the route that is defined and displays the default page view instead.

$main = Page::make( 'main', 'Main' )
			->set();

$foo = Page::make( 'main', 'Foo' )
		   ->setParent( $main->getSlug() )
		   ->set();

$foo->route( '/', 'App\Http\Controllers\MenuController@foo' );

$bar = Page::make( 'bar', 'Bar' )
				 ->setParent( $main->getSlug() )
				 ->set();

$bar->route( '/', 'App\Http\Controllers\MenuController@bar' );

In this example, Main will not appear in the sub menu, Foo will function as expected, but Bar will just display the default Page view as the route will be ignored