After updating from Joomla 4.1.5 to Joomla 4.2.1, menu item detection and module assignment is broken

Hi,

I use Route 66 (free version) on https://uraloved.ru to get nice article URLs containing article alias only (e. g. https://uraloved.ru/reka-chusovaya instead of long URL with a chain of all parent categories). It's important that menu item was detected and modules were assigned correctly.

The extension worked fine on Joomla 3.10.x and on Joomla 4.1.5. However, today, just after update to Joomla 4.2.1, it has broken. Now, the menu item is detected incorrectly. You can see that the active menu item on the example page above is "Главная" (it's slightly highlighted in the menu row), while the correct menu item should be "Места". Also, the module assignment is broken, as well as the overall page layout. It's expected that the page will look like this: https://uraloved.ru/about, with a large left margin (in fact, it's an empty column in the template) and with a few modules in the right column. However, only one column in shown, and apart from this, the "Новые статьи" heading is added to the top of the page, and this is also wrong.

To sum it up, it seems that menu item is detected incorrectly, and this incorrect detection results in several problems with module assignment and layout.

Joomla 4.2.1, Route 66 1.9.7

Will be glad if the bug (if any) is fixed soon or if you can give me any tips on how to deal with this issue.

With regards,

Pavel

In fact, there have been articles with duplicated aliases (I found 3 such articles), but I've changed the aliases so now all aliases are unique, and nothing has changed.
"Главная" menu item is a list of featured articles, and "Места" is a link to a category, so these menu items do not point at the same category.
Now I'm trying to look at the plugin's code to see what happens and where things may go wrong. Maybe this is a site-specific issue which results from a combination of settings. Can you please tell me which files, classes and methods are used to detect menu item and assign modules?

Looks like that I've managed to fix this problem.

After debugging with logging $Itemid value on different steps of application execution, I've found out that route66 system plugin itself detects and sets menu item id correctly. It happens in plugins/system/route66/lib/router.php.

public function postParse($router, $uri)
{
    ...
    if (isset($this->vars['Itemid']))
    {
        $this->menu->setActive($this->vars['Itemid']); // itemid is 120, which is correct
    }
}

However, when I log $Itemid in libraries/src/Application/SiteApplication.php, in getTemplate method, I obtain different value.

public function getTemplate($params = false)
{
    ...		
    // Get the id of the active menu item
    $menu = $this->getMenu();
    $item = $menu->getActive(); // here item id is 101, which corresponds to the main page
...
}

So, setting active menu item in route66 system plugin seems to have no effect. It looks like that active menu item is set on two instances of menu object. I've fixed the problem by a slight change of the code of setMenu method in plugin file.

Existing code

private function setMenu()
{
    $application = JFactory::getApplication();
    $site = CMSApplication::getInstance('site');
    $this->menu = $site->getMenu();
...
}

My hotfix

private function setMenu()
{
    $application = JFactory::getApplication();
    //$site = CMSApplication::getInstance('site');
    $this->menu = $application->getMenu();
...
}

Now everything works. Unfortunately, it's a hack of plugin's code.

At this point, I can't understand why on my site menu getter created two different objects instead of returning the same object for all calls.

1. "System - Route 66" plugin has always been ordered last, so it's unlikely that problem had appeared due to the order of plugins.
2. Solution you have advised works. However, it looks like I'll have to edit this file each time after plugin update :(