structural navigation don't work in dynamic scroll lists

Orca Version

47.2

Actual Behavior

Hi, I'm currently working on the nextcloud news app (https://github.com/nextcloud/news) and trying to improve the accessibility with screen readers, but I stumbled to get the infinity scroll working with orca. The scroll is a dynamic list which only renders the items needed in the view port. I tried different techniques to get this working, without success.

Unfortunately orca seems to have a problem when the first item is removed from the list, the heading or list item navigation than jumps back to the beginning, which is the second item in this case.

Is there something I can do to get this working with orca or is this a general problem.

This is the current structure where I tried aria-posinset as help for orientation:

Providing Debugging Output

Note: If your bug is reproducible 100% of the time using a common distro package, you may disregard the following request.

Please consider capturing full/verbose debugging output as described in https://orca.gnome.org/debugging.html and attaching it to this issue. This debugging information is often extremely helpful to the developer who is trying to address your issue but is unable to reproduce it.