@Quy can you please have a Look?

Most, if not all, core JLayouts use an object for $displayData. In the beginning of JLayout the documentation said "use an array". If I understand it correct, the object data is sent by reference, array data not.
e.g.

LayoutHelper::render('joomla.edit.title_alias', $this)

$form  = $displayData->getForm();

@jooservices is this Issue solved by Comment of @schnuti?

Hi there
Sorry but i don't think so. Even in Joomla! we still have this "issue"

administrator/components/com_users/views/levels/tmpl/default.php
line 40
<?php echo JLayoutHelper::render('joomla.searchtools.default', array('view' => $this, 'options' => array('filterButton' => false))); ?>

So, as you can see param 2 is array.
But inspect
JLayoutHelper::render
we have function
public static function render($layoutFile, $displayData = null, $basePath = '', $options = null)

and docblock is

• @param object $displayData Object which properties are used inside the layout file to build displayed output

So, I think issue still there.

@jooservices Thanks for Comment.

My comment was on the title of the issue. Object is valid as also array or string or null.
If someone wants to exchange Object with Data in a PR it would be neutral and correct.

Gotta love subtleties

Set to "closed" on behalf of @Quy by The JTracker Application at issues.joomla.org/joomla-cms/21071

Fixed in PR #21837