diff --git a/backend/static/js/controllers/chatControllerV2.js b/backend/static/js/controllers/chatControllerV2.js
index 42d98d57..ef01abc1 100644
--- a/backend/static/js/controllers/chatControllerV2.js
+++ b/backend/static/js/controllers/chatControllerV2.js
@@ -45,6 +45,7 @@ export class ChatControllerV2 {
         this.scrollElement = options.scrollElement;
         this.containerId = options.containerId || 'chatScroll';
         this.lastReadMessageId = options.lastReadMessageId || null;
+        this.lastReadTimestamp = options.lastReadTimestamp || null;
 
         // Создаем компоненты
         this.store = new MessageStoreV2({ currentUserId: this.currentUserId });
@@ -114,8 +115,10 @@ export class ChatControllerV2 {
 
         try {
             // 1. Загружаем сообщения
+            // Используем timestamp как fallback если нет message ID (API поддерживает оба)
+            const anchorValue = this.lastReadMessageId || this.lastReadTimestamp;
             const loadResult = await this.loader.loadInitial(this.chatId, {
-                aroundMessageId: this.lastReadMessageId
+                aroundMessageId: anchorValue
             });
 
             // 2. Скрываем контейнер для плавного рендера
diff --git a/backend/static/js/pages/chatDetail.js b/backend/static/js/pages/chatDetail.js
index 30cbc62e..3e0be5e5 100644
--- a/backend/static/js/pages/chatDetail.js
+++ b/backend/static/js/pages/chatDetail.js
@@ -183,7 +183,8 @@ async function initializeComponents(config, userWs) {
     profileUrl: config.profileUrl || '/employees/profile/',
     detailUrlTemplate: config.detailUrlTemplate || '/employees/detail/0/',
     messagesUrl: config.messagesUrl,
-    lastReadTimestamp: config.lastReadMessageId || config.lastReadTimestamp  // Используем message_id, fallback на timestamp
+    lastReadMessageId: config.lastReadMessageId,  // ✅ Передаем message_id
+    lastReadTimestamp: config.lastReadTimestamp   // ✅ Fallback на timestamp
   });
   
   console.log('[ChatDetail] Initializing ChatController...');