Preview for templates page two not openable

Hej,
@macmanx recommended me to post it here again.

„Hej everyone,
I’m new here and still a bit inexperienced 😉
I hope my explanation is understandable and someone from the experienced ones can help me?

Only occurs when using Firefox, even in the private tab (without plugins)
I am using the current version of WordPress 6.5
I have created a screencast to illustrate this

https://gemoo.com/tools/upload-video/share/634877159992377344?codeId=MpOkql2pb5GgN&card=634877155940679680

Here is a brief “description”:
When selecting a template, the problem is that, for example, tabs (such as “Banner” or “Call to action”) that display templates on several pages cannot be called up.
When I click on the arrow at the bottom to go to the next page, the window simply closes and I get to the page where I wanted to add a template.

The “All” tab displays < 1 of 18 > pages. However, this only happens if you click on the double arrow at the bottom.

If I go to the “All” tab to get a complete overview of all templates, this also closes when I use the double arrow (to go directly to the last page).”