Hi Sonny,
I have tested a lot. :-)
My setup: Joomla 5.3.0 Alpha1, PHP 8.4.1, AF 3.1.9 (Stable and RC)
My first question: When I test under the Pro agreement, where can I give feedback if I found a bug or not? I didn't want to open a new issue every time I tested something, e.g. I didn't find a bug with 3.1.9 (RC) last week, but didn't report it again.

About the bug: I'm not sure if it has already been reported, but AF does not apply the formatting in the text widget. But only if it is displayed as a module. It works directly in the Layout Manager in the template.
Example: I set a text widget in the module manager directly in Joomla, write a text in the text field and format this text centered and in H2.
After saving, the H2 formatting and centering is removed again.
Note: The formatting disappears when I save the module, not the widget setting.

WBR,
deltapapa