diff --git a/packages/core/data/observable-array/index.ts b/packages/core/data/observable-array/index.ts
index b7f390cc1..cc026e91e 100644
--- a/packages/core/data/observable-array/index.ts
+++ b/packages/core/data/observable-array/index.ts
@@ -246,7 +246,7 @@ export class ObservableArray<T> extends Observable {
 			eventName: CHANGE,
 			object: this,
 			action: ChangeType.Splice,
-			index: start,
+			index: Math.min(start, this._array.length-1),
 			removed: result,
 			addedCount: this._array.length + result.length - length,
 		});