Steps to reproduce:

1. Add some content under an "Ibexa Platform" folder.
2. Use the following code to verify how locations are sorted when using the loadLocationChildren API method:

           $location = $this->locationService->loadLocation(2);
           dump($location->sortOrder);
           dump($location->sortField);
           $children = $this->locationService->loadLocationChildren($location);
           dump($children);
   

3. Play around with "Ibexa Digital Experience Platform" content sorting options for subitems and compare dump results with step 2.

Result:
Contents are always sorted in the same way.

Expected result:
Contents should be sorted according to the sort clauses set.