diff --git a/src/Umbraco.Web.UI.Client/src/libs/extension-api/bundle-extension-initializer.ts b/src/Umbraco.Web.UI.Client/src/libs/extension-api/bundle-extension-initializer.ts
index 11407f5020..4f7fac564e 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/extension-api/bundle-extension-initializer.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/extension-api/bundle-extension-initializer.ts
@@ -26,7 +26,13 @@ export class UmbBundleExtensionInitializer {
 
 		if (js) {
 			Object.keys(js).forEach((key) => {
-				this.#extensionRegistry.registerMany(js[key]);
+				const value = js[key];
+
+				if (Array.isArray(value)) {
+					this.#extensionRegistry.registerMany(value);
+				} else if (typeof value === 'object') {
+					this.#extensionRegistry.register(value);
+				}
 			});
 		}
 	}
diff --git a/src/Umbraco.Web.UI.Client/src/libs/extension-api/registry/extension.registry.ts b/src/Umbraco.Web.UI.Client/src/libs/extension-api/registry/extension.registry.ts
index 1bbecf1ed2..107dbcfd41 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/extension-api/registry/extension.registry.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/extension-api/registry/extension.registry.ts
@@ -62,6 +62,8 @@ export class UmbExtensionRegistry<
 	}
 
 	register(manifest: ManifestTypes | ManifestKind<ManifestTypes>): void {
+		// TODO: Consider if we need to implement some safety features here, like checking if the object has a 'type' and/or 'alias'?
+
 		if (manifest.type === 'kind') {
 			this.defineKind(manifest as ManifestKind<ManifestTypes>);
 			return;