Steps to reproduce the issue

Create a menu item of type category list
Add a page class in the 'Page Display' tab

Expected result

<div class="com-content-category category-list"> from default.php
<div class="content-category my-class">
(I'm not sure where this element comes from, it doesn't appear in the overrides, so it's not possible to edit it. I think it is generated with this code:

$this->subtemplatename = 'articles';
echo LayoutHelper::render('joomla.content.category_default', $this);
?>

in default.php

Actual result

<div class="com-content-category category-list">
<div> - where has this extra element come from?
<div class="content-categorymy-class"> - no space between classes. Hangover from J3?

System information (as much as possible)

J4.0.5

Additional comments