Steps to reproduce the issue

1. In System -> Global Configuration -> Site, set Default Editor to Editor - None.
2. In System -> Global Configuration -> Text Filters, set Filter Type for the Super Users group to Default Forbidden List.
3. Click Content -> Articles -> New to create a new article.
4. Paste in the content below. Note the (valid) special character in the href attribute value.

<a href="https://www.ikea.com/gb/en/p/birkelånga-tray-patterned-multicolour-grey-green-40537947" target="_blank">BIRKELÅNGA</a>

5. Click Save

Expected result

The article content should remain intact as the HTML is valid.

Actual result

The content becomes

a href="https://www.ikea.com/gb/en/p/birkelånga-tray-patterned-multicolour-grey-green-40537947&quot;&quot;"BIRKELÅNGA</a>

once filtered and saved. The first < and > from the <a> tag are removed and the last " of the attribute value is encoded.

System information (as much as possible)

Joomla 4.2.4
Browser (Any)
PHP 8.0.14

Additional comments

When the Text Filter Filter Type is set to No Filtering, this issue does not occur, and the content is saved correctly.