diff --git a/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue b/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue
index 35283f3a..41fbebdd 100644
--- a/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue
+++ b/web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue
@@ -299,8 +299,11 @@ function messageActivityMeta(message: ChatMessage): { text: string; label: strin
 }
 
 function messageTimingForDisplay(message: ChatMessage): ChatMessage["timing"] {
-  if (!isRunningMessage(message)) return message.timing ?? message.runnerTrace?.timing ?? null;
-  return message.runnerTrace?.timing ?? message.timing ?? null;
+  // The main message card consumes only the durable message timing projection.
+  // Trace timing belongs to TraceTimeline/details; letting trace hydration drive the
+  // card timer makes running turns jump when a later trace snapshot carries an
+  // older startedAt/lastEventAt window.
+  return message.timing ?? null;
 }
 
 function terminalMessageDurationMs(message: ChatMessage, timing: ChatMessage["timing"]): number | null {