diff --git a/src/components/network-area-diagram-viewer/network-area-diagram-viewer.ts b/src/components/network-area-diagram-viewer/network-area-diagram-viewer.ts
index 5f0f343d..0717235f 100644
--- a/src/components/network-area-diagram-viewer/network-area-diagram-viewer.ts
+++ b/src/components/network-area-diagram-viewer/network-area-diagram-viewer.ts
@@ -446,6 +446,7 @@ export class NetworkAreaDiagramViewer {
         }
         // reset data
         this.draggedElement = null;
+        this.ctm = null;
         this.enablePanzoom();
 
         // change cursor style back to normal