diff --git a/wwwroot/js/history.js b/wwwroot/js/history.js
index b8eae66..9bd6a74 100644
--- a/wwwroot/js/history.js
+++ b/wwwroot/js/history.js
@@ -165,6 +165,7 @@ function _mergeConsecutiveAssistantTexts(msgs) {
           && !_isReviewMessage(msg.content) && !_isReviewMessage(prev.content)) {
         prev.content = (prev.content || '') + ' ' + (msg.content || '');
         if (msg.id) prev.id = msg.id;
+        if (msg.sortKey && (!prev.sortKey || msg.sortKey > prev.sortKey)) prev.sortKey = msg.sortKey;
         if (msg.createdAt) prev.createdAt = msg.createdAt;
         if (msg.isMarked) prev.isMarked = true;
         continue;