diff --git a/main/xiaozhi-server/config/logger.py b/main/xiaozhi-server/config/logger.py
index 5981822c..cc87807b 100644
--- a/main/xiaozhi-server/config/logger.py
+++ b/main/xiaozhi-server/config/logger.py
@@ -25,6 +25,12 @@ def build_module_string(selected_module):
     )
 
 
+def formatter(record):
+    """为没有 tag 的日志添加默认值"""
+    record["extra"].setdefault("tag", record["name"])
+    return record["message"]
+
+
 def setup_logging():
     """从配置文件中读取日志配置，并设置日志输出格式和级别"""
     config = load_config()
@@ -56,9 +62,9 @@ def setup_logging():
     logger.remove()
 
     # 输出到控制台
-    logger.add(sys.stdout, format=log_format, level=log_level)
+    logger.add(sys.stdout, format=log_format, level=log_level, filter=formatter)
 
     # 输出到文件
-    logger.add(os.path.join(log_dir, log_file), format=log_format_file, level=log_level)
+    logger.add(os.path.join(log_dir, log_file), format=log_format_file, level=log_level, filter=formatter)
 
     return logger
diff --git a/main/xiaozhi-server/core/connection.py b/main/xiaozhi-server/core/connection.py
index 3a69d096..b86cc24f 100644
--- a/main/xiaozhi-server/core/connection.py
+++ b/main/xiaozhi-server/core/connection.py
@@ -335,10 +335,8 @@ class ConnectionHandler:
 
     def change_system_prompt(self, prompt):
         self.prompt = prompt
-        # 找到原来的role==system，替换原来的系统提示
-        for m in self.dialogue.dialogue:
-            if m.role == "system":
-                m.content = prompt
+        # 更新系统prompt至上下文
+        self.dialogue.update_system_message(self.prompt)
 
     def chat(self, query):
 
diff --git a/main/xiaozhi-server/core/providers/llm/dify/dify.py b/main/xiaozhi-server/core/providers/llm/dify/dify.py
index 26bb48b7..030aba05 100644
--- a/main/xiaozhi-server/core/providers/llm/dify/dify.py
+++ b/main/xiaozhi-server/core/providers/llm/dify/dify.py
@@ -58,7 +58,8 @@ class LLMProvider(LLMProviderBase):
                                 self.session_conversation_map[session_id] = (
                                     conversation_id  # 更新映射
                                 )
-                            if event.get("answer"):
+                            # 过滤 message_replace 事件，此事件会全量推一次
+                            if event.get("event") != "message_replace" and event.get("answer"):
                                 yield event["answer"]
                 elif self.mode == "workflows/run":
                     for line in r.iter_lines():
@@ -73,7 +74,8 @@ class LLMProvider(LLMProviderBase):
                     for line in r.iter_lines():
                         if line.startswith(b"data: "):
                             event = json.loads(line[6:])
-                            if event.get("answer"):
+                            # 过滤 message_replace 事件，此事件会全量推一次
+                            if event.get("event") != "message_replace" and event.get("answer"):
                                 yield event["answer"]
 
         except Exception as e: