diff --git a/packages/backend/server/src/core/auth/guard.ts b/packages/backend/server/src/core/auth/guard.ts
index d1ff3ab89d9fb..a60822001e13c 100644
--- a/packages/backend/server/src/core/auth/guard.ts
+++ b/packages/backend/server/src/core/auth/guard.ts
@@ -11,7 +11,7 @@ import {
 } from '@nestjs/common';
 import { ModuleRef, Reflector } from '@nestjs/core';
 
-import { Config, getRequestResponseFromContext } from '../../fundamentals';
+import { getRequestResponseFromContext } from '../../fundamentals';
 import { AuthService, parseAuthUserSeqNum } from './service';
 
 function extractTokenFromHeader(authorization: string) {
@@ -27,7 +27,6 @@ export class AuthGuard implements CanActivate, OnModuleInit {
   private auth!: AuthService;
 
   constructor(
-    private readonly config: Config,
     private readonly ref: ModuleRef,
     private readonly reflector: Reflector
   ) {}
@@ -43,17 +42,6 @@ export class AuthGuard implements CanActivate, OnModuleInit {
     let sessionToken: string | undefined =
       req.cookies[AuthService.sessionCookieName];
 
-    // backward compatibility for client older then 0.12
-    // TODO: remove
-    if (!sessionToken) {
-      sessionToken =
-        req.cookies[
-          this.config.https
-            ? '__Secure-next-auth.session-token'
-            : 'next-auth.session-token'
-        ];
-    }
-
     if (!sessionToken && req.headers.authorization) {
       sessionToken = extractTokenFromHeader(req.headers.authorization);
     }
diff --git a/packages/backend/server/src/core/doc/manager.ts b/packages/backend/server/src/core/doc/manager.ts
index faa50ecc7dba8..87c09fd8269a5 100644
--- a/packages/backend/server/src/core/doc/manager.ts
+++ b/packages/backend/server/src/core/doc/manager.ts
@@ -272,11 +272,15 @@ export class DocManager implements OnModuleInit, OnModuleDestroy {
     updates: Buffer[],
     retryTimes = 10
   ) {
-    const lastSeq = await this.getUpdateSeq(workspaceId, guid, updates.length);
-    const now = Date.now();
-    let timestamp = now;
-    await new Promise<void>((resolve, reject) => {
+    const timestamp = await new Promise<number>((resolve, reject) => {
       defer(async () => {
+        const lastSeq = await this.getUpdateSeq(
+          workspaceId,
+          guid,
+          updates.length
+        );
+        const now = Date.now();
+        let timestamp = now;
         let turn = 0;
         const batchCount = 10;
         for (const batch of chunk(updates, batchCount)) {
@@ -303,14 +307,16 @@ export class DocManager implements OnModuleInit, OnModuleDestroy {
           });
           turn++;
         }
+
+        return timestamp;
       })
         .pipe(retry(retryTimes)) // retry until seq num not conflict
         .subscribe({
-          next: () => {
+          next: timestamp => {
             this.logger.debug(
               `pushed ${updates.length} updates for ${guid} in workspace ${workspaceId}`
             );
-            resolve();
+            resolve(timestamp);
           },
           error: e => {
             this.logger.error('Failed to push updates', e);