diff --git a/src/Umbraco.Web.UI.Client/src/packages/documents/document-types/property-editors/document-type-picker/property-editor-ui-document-type-picker.element.ts b/src/Umbraco.Web.UI.Client/src/packages/documents/document-types/property-editors/document-type-picker/property-editor-ui-document-type-picker.element.ts
index b73d7b9998..e1604bb787 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/documents/document-types/property-editors/document-type-picker/property-editor-ui-document-type-picker.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/documents/document-types/property-editors/document-type-picker/property-editor-ui-document-type-picker.element.ts
@@ -45,7 +45,7 @@ export class UmbPropertyEditorUIDocumentTypePickerElement extends UmbLitElement
 				.min=${this.min}
 				.max=${this.max}
 				.value=${this.value}
-				?elementTypesOnly=${this.onlyElementTypes}
+				.elementTypesOnly=${this.onlyElementTypes ?? false}
 				?showOpenButton=${this.showOpenButton}
 				@change=${this.#onChange}>
 			</umb-input-document-type>
diff --git a/src/Umbraco.Web.UI.Client/src/packages/webhook/workspace/webhook/views/webhook-details-workspace-view.element.ts b/src/Umbraco.Web.UI.Client/src/packages/webhook/workspace/webhook/views/webhook-details-workspace-view.element.ts
index 874d2b3764..0be8864bd5 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/webhook/workspace/webhook/views/webhook-details-workspace-view.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/webhook/workspace/webhook/views/webhook-details-workspace-view.element.ts
@@ -90,7 +90,7 @@ export class UmbWebhookDetailsWorkspaceViewElement extends UmbLitElement impleme
 						slot="editor"
 						@change=${this.#onTypesChange}
 						.selection=${this._webhook?.contentTypes ?? []}
-						?documentTypesOnly=${true}></umb-input-document-type>
+						.documentTypesOnly=${true}></umb-input-document-type>
 				`;
 			case 'Media':
 				return html`