What happened?

1. Add a Page Class value to Category Blog
2. View HTML on article
3. Merged class names knock out generic CSS for .item-page
4. Merged class names knock out CSS targeting for the actual Page Class value

Version

6.0

Expected result

<main>
<div class="com-content-article item-page page-class">

Actual result

<main>
<div class="com-content-article item-pagepage-class">

System Information

Clean install of Joomla 6.0.3

Additional Comments

Discussion suggests this is a long standing bug and experienced admins are aware of a workaround, adding a space character before the Page Class value. However this is undocumented.