diff --git a/packages/data-center/src/datacenter.ts b/packages/data-center/src/datacenter.ts
index e4fe394c71..8e70718c36 100644
--- a/packages/data-center/src/datacenter.ts
+++ b/packages/data-center/src/datacenter.ts
@@ -186,7 +186,7 @@ export class DataCenter {
    */
   public async onWorkspacesChange(
     callback: (workspaces: WorkspaceUnitCollectionChangeEvent) => void,
-    { immediate = true }: { immediate?: boolean }
+    { immediate = true }: { immediate?: boolean } = {}
   ) {
     if (immediate) {
       callback({
diff --git a/packages/data-center/src/provider/affine/affine.ts b/packages/data-center/src/provider/affine/affine.ts
index cbe5adef18..890fc6dc00 100644
--- a/packages/data-center/src/provider/affine/affine.ts
+++ b/packages/data-center/src/provider/affine/affine.ts
@@ -16,6 +16,7 @@ import { getApis } from './apis/index.js';
 import type { Apis, WorkspaceDetail, Callback } from './apis';
 import { setDefaultAvatar } from '../utils.js';
 import { MessageCode } from '../../message';
+import { blob } from 'stream/consumers';
 
 export interface AffineProviderConstructorParams
   extends ProviderConstructorParams {
@@ -348,9 +349,10 @@ export class AffineProvider extends BaseProvider {
     assert(to.room, 'Blocksuite Workspace without room(workspaceId).');
     const ws = this._getWebsocketProvider(to);
     applyUpdate(to.doc, encodeStateAsUpdate(from.doc));
+    // TODO: upload blobs and make sure doc is synced
     await new Promise<void>((resolve, reject) => {
       ws.once('synced', () => {
-        resolve();
+        setTimeout(() => resolve(), 1000);
       });
       ws.once('lost-connection', () => reject());
       ws.once('connection-error', () => reject());