Index: trunk/src/org/openstreetmap/josm/gui/dialogs/RelationListDialog.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/RelationListDialog.java	(revision 5617)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/RelationListDialog.java	(revision 5619)
@@ -715,4 +715,5 @@
             List<Relation> sel =  getSelectedRelations();
             this.relations.clear();
+            this.filteredRelations = null;
             if (relations == null) {
                 selectionModel.clearSelection();