diff --git a/apps/server/src/services/rundown-service/delayedRundown.utils.ts b/apps/server/src/services/rundown-service/delayedRundown.utils.ts
index 51c7d727d..9b6387471 100644
--- a/apps/server/src/services/rundown-service/delayedRundown.utils.ts
+++ b/apps/server/src/services/rundown-service/delayedRundown.utils.ts
@@ -132,12 +132,13 @@ export async function cachedDelete(eventId: string) {
   }
 
   let updatedRundown = DataProvider.getRundown();
+  const eventBack = { ...updatedRundown[eventIndex] };
   updatedRundown = deleteAtIndex(eventIndex, updatedRundown);
   if (eventId !== delayedRundown[eventIndex].id) {
     invalidateFromError();
   } else {
     delayedRundown = deleteAtIndex(eventIndex, delayedRundown);
-    if (isOntimeDelay(updatedRundown[eventIndex]) || isOntimeBlock(updatedRundown[eventIndex])) {
+    if (isOntimeDelay(eventBack) || isOntimeBlock(eventBack)) {
       // for events, we do not have to worry
       // the following event, would have taken the place of the deleted event by now
       delayedRundown = calculateRuntimeDelaysFromIndex(eventIndex, delayedRundown);
diff --git a/e2e/tests/features/203-delay-block.spec.ts b/e2e/tests/features/203-delay-block.spec.ts
index ce385aa1f..d4e543921 100644
--- a/e2e/tests/features/203-delay-block.spec.ts
+++ b/e2e/tests/features/203-delay-block.spec.ts
@@ -47,6 +47,7 @@ test('delay blocks add time to events', async ({ page }) => {
   // cancel delay
   await page.getByRole('button', { name: 'Cancel' }).click();
   await expect(page.getByTestId('panel-rundown').getByTestId('time-input-timeStart')).toHaveValue('00:08:00');
+  await expect(page.getByText('+10 minNew start: 00:18:00')).toHaveCount(0);
 });
 
 test('delays are show correctly', async ({ page }) => {
diff --git a/packages/types/src/utils/guards.ts b/packages/types/src/utils/guards.ts
index 3bdfd19d4..11f132707 100644
--- a/packages/types/src/utils/guards.ts
+++ b/packages/types/src/utils/guards.ts
@@ -2,13 +2,13 @@ import { OntimeRundownEntry } from '../definitions/core/Rundown.type.js';
 import { OntimeBlock, OntimeDelay, OntimeEvent, SupportedEvent } from '../definitions/core/OntimeEvent.type.js';
 
 export function isOntimeEvent(event: OntimeRundownEntry | Partial<OntimeRundownEntry>): event is OntimeEvent {
-  return event.type === SupportedEvent.Event;
+  return event?.type === SupportedEvent.Event;
 }
 
 export function isOntimeDelay(event: OntimeRundownEntry | Partial<OntimeRundownEntry>): event is OntimeDelay {
-  return event.type === SupportedEvent.Delay;
+  return event?.type === SupportedEvent.Delay;
 }
 
 export function isOntimeBlock(event: OntimeRundownEntry | Partial<OntimeRundownEntry>): event is OntimeBlock {
-  return event.type === SupportedEvent.Block;
+  return event?.type === SupportedEvent.Block;
 }