[SI-1629] BugFix Verteilergruppen

Signed-off-by: Peter Buschmann <peter.buschmann@pta.de>
diff --git a/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.ts b/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.ts
index 783728c..de18fc1 100644
--- a/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.ts
+++ b/projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.sandbox.ts
@@ -761,6 +761,7 @@
     this.appState$.dispatch(new EnableAction(FORM_ID));
     this._gridFailureId = null;
     this.maxVersionNumber = null;
+    this._assignedDistributionGroups = null;
     navigateHome(this._router);
   }