diff --git a/index.js b/index.js
index 589cd5d..44bc789 100644
--- a/index.js
+++ b/index.js
@@ -2848,8 +2848,9 @@ function schedulePersistedRecallMessageUiRefresh(delayMs = 0) {
         summary.status === "missing_message_anchor") &&
       attemptIndex < retryDelays.length - 1;
 
-    const shouldWatchForRepaint =
-      summary.status === "rendered" && summary.renderedCount > 0;
+    // 勿在「已成功渲染」时长期挂 MutationObserver：#chat 上 class/流式更新会疯狂触发
+    // runAttempt，造成满屏刷新与日志；显式事件（USER_MESSAGE_RENDERED 等）仍会 schedule 刷新。
+    const shouldWatchForRepaint = false;
 
     if (!shouldRetryForPending && !shouldWatchForRepaint) {
       clearPersistedRecallMessageUiObserver();
diff --git a/recall-persistence.js b/recall-persistence.js
index 1eaf898..b418474 100644
--- a/recall-persistence.js
+++ b/recall-persistence.js
@@ -134,11 +134,13 @@ export function resolveGenerationTargetUserMessageIndex(
 
   const normalizedType = String(generationType || "normal").trim() || "normal";
 
+  // normal：取「最后一条非系统用户楼层」。若直接 return 末条非 user（常见为刚追加的助手回合），
+  // 会得到 null，导致持久化无法回绑到本轮 user，`hasRecordForLatest` 长期为 false。
   if (normalizedType === "normal") {
     for (let index = chat.length - 1; index >= 0; index--) {
       const message = chat[index];
       if (message?.is_system) continue;
-      return message?.is_user ? index : null;
+      if (message?.is_user) return index;
     }
     return null;
   }