diff --git a/src/Umbraco.Web.UI.Client/src/libs/observable-api/states/array-state.ts b/src/Umbraco.Web.UI.Client/src/libs/observable-api/states/array-state.ts
index c31a4d98a7..57adf7f0a1 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/observable-api/states/array-state.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/observable-api/states/array-state.ts
@@ -35,7 +35,10 @@ export class UmbArrayState<T> extends UmbDeepState<T[]> {
 	 */
 	sortBy(sortMethod?: (a: T, b: T) => number) {
 		this.#sortMethod = sortMethod;
-		super.setValue(this.getValue().sort(this.#sortMethod));
+		const value = this.getValue();
+		if(value) {
+			super.setValue([...value].sort(this.#sortMethod));
+		}
 		return this;
 	}
 
@@ -51,7 +54,7 @@ export class UmbArrayState<T> extends UmbDeepState<T[]> {
 	 */
 	override setValue(value: T[]) {
 		if (this.#sortMethod) {
-			super.setValue(value.sort(this.#sortMethod));
+			super.setValue([...value].sort(this.#sortMethod));
 		} else {
 			super.setValue(value);
 		}
diff --git a/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/manifests.ts b/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/manifests.ts
index c3d07105cc..bbb50aafbc 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/manifests.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/manifests.ts
@@ -1,5 +1,5 @@
-import { manifest as blockListSchemaManifest } from './Umbraco.BlockList.js';
 import type { ManifestTypes } from '@umbraco-cms/backoffice/extension-registry';
+import { manifest as blockListSchemaManifest } from './Umbraco.BlockList.js';
 
 export const UMB_BLOCK_LIST_PROPERTY_EDITOR_ALIAS = 'Umbraco.BlockList';