diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/content-type/structure/content-type-structure-manager.class.ts b/src/Umbraco.Web.UI.Client/src/packages/core/content-type/structure/content-type-structure-manager.class.ts
index 7e846ba8a2..8fe26a1460 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/content-type/structure/content-type-structure-manager.class.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/content-type/structure/content-type-structure-manager.class.ts
@@ -46,7 +46,7 @@ export class UmbContentTypeStructureManager<
 		(x) => x.find((y) => y.unique === this.#ownerContentTypeUnique)?.compositions,
 	);
 
-	readonly #contentTypeContainers = this.#contentTypes.asObservablePart((x) => {
+	readonly #contentTypeContainers = this.#contentTypes.asObservablePart(() => {
 		return this.#contentTypes.getValue().flatMap((x) => x.containers ?? []);
 	});
 	readonly contentTypeUniques = this.#contentTypes.asObservablePart((x) => x.map((y) => y.unique));