Force a map render when the view is not updated

src/ol/interaction/dragpan.js

@@ -114,6 +114,9 @@ ol.interaction.DragPan.handleUpEvent_ = function(mapBrowserEvent) {
       ]);
       dest = view.constrainCenter(dest);
       view.setCenter(dest);
+    } else {
+      // the view is not updated, force a render
+      map.render();
     }
     view.setHint(ol.View.Hint.INTERACTING, -1);
     return false;