Bug 67716 [ProblemsView] Trying to sort in Problems View removes all items from view
Configure the problems view to display "selected resource and it children". Open a file with a couple of warnings. Sort by any of the columns in the table. All table items are removed and the view is displaying ZERO hits.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
MarkerFilter filter = getFilter();
		if (!filter.isEnabled()) {
			return false;
		}
		
		int onResource = filter.getOnResource();
		if (onResource == MarkerFilter.ON_ANY_RESOURCE || onResource == MarkerFilter.ON_WORKING_SET) {
			return false;
		}
		if (newResources == null || newResources.length < 1) {
			return false;
		}
		if (oldResources == null || oldResources.length < 1) {
			return true;
		}
		if (Arrays.equals(oldResources, newResources)) {
			return false;
		}
		if (onResource == MarkerFilter.ON_ANY_RESOURCE_OF_SAME_PROJECT) {
			Collection oldProjects = MarkerFilter.getProjectsAsCollection(oldResources);
			Collection newProjects = MarkerFilter.getProjectsAsCollection(newResources);
			
			if (oldProjects.size() == newProjects.size()) {
				return !newProjects.containsAll(oldProjects);
			} else {
				return true;
			}
		}