This describes functionality that seems to be removed but it goes like this:

When I render a filter results (eg: assignee = currentuser() ) and start working through the issues that are returned when I change the assignee, which removes the current issue from the filter set, the navigation arrows/counter ("X of Y") is removed, rendering the use of the filter results useless.

This translates into being able to operate on one item in a filter result at a time which seems rather inefficient.