diff --git a/library/Businessprocess/Renderer/Renderer.php b/library/Businessprocess/Renderer/Renderer.php
index c6efd46..4855f02 100644
--- a/library/Businessprocess/Renderer/Renderer.php
+++ b/library/Businessprocess/Renderer/Renderer.php
@@ -301,6 +301,11 @@ abstract class Renderer extends Html
 
     protected function createUnboundParent(BpConfig $bp)
     {
+        // Hint: state is useless here, but triggers parent/child "calculation"
+        //       This is an ugly workaround and should be made obsolete
+        foreach ($bp->getBpNodes() as $p) {
+            $p->getState();
+        }
         $unbound = $bp->getUnboundNodes();
 
         $parent = new BpNode($bp, (object) array(