Grouped Listview-Rendering not working with webpart-filter

Hi,

i have a problem with document libraries, which has a grouped view and are connected to a query-string-filter-webpart.

Everything works like a charm when opening the first time.

But if i checkout one document, the view lists all the groups, as if the filter is not applied.

The count number lists all documents, and even all groups are listed. But if i expand the other groups, they are all empty.

It seems the filter is working correct, but the list-view-rendering does not reflect the results.

This bug is always reproducible on all document-libraries.

System:

Sharepoint 2013 Enterprise Edition ver. 15.0.4805.1000