diff --git a/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.test.ts b/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.test.ts
index 4500b386..4c701860 100644
--- a/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.test.ts
+++ b/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.test.ts
@@ -23,6 +23,7 @@ const baseAgentMessage: ChatMessage = {
 
 test("conversation panel auto replays compact historical traces", () => {
   assert.equal(shouldAutoReplayTrace(baseAgentMessage), true);
+  assert.equal(shouldAutoReplayTrace({ ...baseAgentMessage, runnerTrace: { ...baseAgentMessage.runnerTrace, fullTraceLoaded: true, events: [] } }), true);
 });
 
 test("conversation panel does not auto replay loaded, empty, or running traces", () => {
@@ -30,5 +31,5 @@ test("conversation panel does not auto replay loaded, empty, or running traces",
   assert.equal(shouldAutoReplayTrace({ ...baseAgentMessage, runnerTrace: { ...baseAgentMessage.runnerTrace, eventCount: 0 } }), false);
   assert.equal(shouldAutoReplayTrace({ ...baseAgentMessage, status: "running" }), false);
   assert.equal(shouldAutoReplayTrace({ ...baseAgentMessage, traceReplayStatus: "完整 trace 已回放：49 个原始 event" }), false);
-  assert.equal(shouldAutoReplayTrace({ ...baseAgentMessage, runnerTrace: { ...baseAgentMessage.runnerTrace, fullTraceLoaded: true } }), false);
+  assert.equal(shouldAutoReplayTrace({ ...baseAgentMessage, runnerTrace: { ...baseAgentMessage.runnerTrace, fullTraceLoaded: true, events: [{ seq: 1, label: "assistant:message" }] } }), false);
 });
diff --git a/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.tsx b/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.tsx
index d57b5d64..76b6dc6b 100644
--- a/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.tsx
+++ b/web/hwlab-cloud-web/src/components/conversation/ConversationPanel.tsx
@@ -107,8 +107,8 @@ export function shouldAutoReplayTrace(message: ChatMessage): boolean {
   if (!traceId) return false;
   if (message.status === "running" || trace?.status === "running") return false;
   if (message.traceReplayStatus) return false;
-  if (trace?.fullTraceLoaded === true) return false;
   const events = Array.isArray(trace?.events) ? trace.events : [];
+  if (trace?.fullTraceLoaded === true && events.length > 0) return false;
   const declaredCount = Number(trace?.eventCount ?? 0);
   return events.length === 0 && declaredCount > 0;
 }