TVML web inspector stopped working?

Did anyone experience that the Safari/Safari Web Preview web inspector stopped working for TVML projects? In the past it was possible to browse DOM elements using that tool - at this moment it's always empty.

If you have any hints to make it working again I would be glad to hear it, thx!

tools stack Safari 16.6 macOS 13.5 (22G74) Xcode version 15.0 (15A240d)