Please tell us the exact PHP Version. As $parts should be an array and impode is constructed to move arrays to strings. I'm a bit confused.

php 5.5.9
if $link = "index.php?option=com_plugins&view=plugins&filter[search]=search";
$uri->getQuery(true);
will return

array (
   'option' => 'com_plugins',
   'view' => 'plugins',
   'filter' =>
   array (
   'search' => 'search',
   ),
   )

The issue is in administrator/modules/mod_menu/menu.php on line 610

				$parts[] = str_replace(array('.', '_'), '-', $value);

Try to replace it with

				if (!is_array($value))
				{
					$parts[] = str_replace(array('.', '_'), '-', $value);
				}
				else
				{
					foreach ($value as $k => $v)
					{
						$parts[] = $k.'-'.str_replace(array('.', '_'), '-', $v);
					}
				}

@VampiRUS have you tried above Suggestion?

@franz-wohlkoenig yes it helps

@VampiRUS as Issue is resolved can you please close the Issue?

@franz-wohlkoenig this is issue in joomla code, i think it must be fixed there.

@maintainers any Opinion?

@franz-wohlkoenig just FYI you can't tag @maintainers you just tag this org: https://github.com/maintainers ;)

Regarding the topic what about doing the suggested code changes as PR so we can test and merge the fix?

@zero-24 will try to remember :-)

I don't remember what the permissions are on GitHub but you can try pinging @joomla/cms-maintainers

IMO you need to be part of that team or owner to be allowed to ping the team ;)

I don't remember what the permissions are on who can ping teams or who is in what team off the top of my head. If the feature works for him then cool, if not, well, blame GitHub 😉

pinging https://github.com/maintainers & @joomla/cms-maintainers

@izharaazmi

This issue is out of context since the merge of #16451. The changes can be see here

I have also verified the new code and I can confirm that this was not carried over. Hence IMHO, this can be safely closed. Thanks.

closed as stated above.

Set to "closed" on behalf of @franz-wohlkoenig by The JTracker Application at issues.joomla.org/joomla-cms/17128