diff --git a/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue b/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue
index 2264a6c6..da9108db 100644
--- a/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue
+++ b/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue
@@ -307,13 +307,27 @@ function messageTimingForDisplay(message: ChatMessage): ChatMessage["timing"] {
 }
 
 function terminalMessageDurationMs(message: ChatMessage, timing: ChatMessage["timing"]): number | null {
-  const recorded = maxPositiveDurationMs(message.durationMs, timing?.durationMs, message.runnerTrace?.durationMs, message.runnerTrace?.timing?.durationMs);
-  if (recorded !== null) return recorded;
   const elapsed = elapsedTerminalDurationMs(message, timing);
   if (elapsed !== null && elapsed > 0) return elapsed;
+  const recorded = sealedTerminalRecordedDurationMs(message, timing);
+  if (recorded !== null) return recorded;
   return null;
 }
 
+function sealedTerminalRecordedDurationMs(message: ChatMessage, timing: ChatMessage["timing"]): number | null {
+  const messageRecord = message as Record<string, unknown>;
+  const trace = message.runnerTrace as Record<string, unknown> | null | undefined;
+  const traceTiming = trace?.timing as Record<string, unknown> | null | undefined;
+  const messageHasTerminalTimestamp = timestampMs(timing?.finishedAt ?? message.finishedAt ?? messageRecord.completedAt) !== null;
+  const traceHasTerminalTimestamp = timestampMs(traceTiming?.finishedAt ?? trace?.finishedAt ?? traceTiming?.completedAt ?? trace?.completedAt) !== null;
+  return maxPositiveDurationMs(
+    messageHasTerminalTimestamp ? message.durationMs : null,
+    messageHasTerminalTimestamp ? timing?.durationMs : null,
+    traceHasTerminalTimestamp ? message.runnerTrace?.durationMs : null,
+    traceHasTerminalTimestamp ? message.runnerTrace?.timing?.durationMs : null
+  );
+}
+
 function elapsedTerminalDurationMs(message: ChatMessage, timing: ChatMessage["timing"]): number | null {
   const messageRecord = message as Record<string, unknown>;
   const trace = message.runnerTrace as Record<string, unknown> | null | undefined;