diff --git a/web/hwlab-cloud-web/src/composables/useTraceSubscription.ts b/web/hwlab-cloud-web/src/composables/useTraceSubscription.ts
index 49c087e2..79af5121 100644
--- a/web/hwlab-cloud-web/src/composables/useTraceSubscription.ts
+++ b/web/hwlab-cloud-web/src/composables/useTraceSubscription.ts
@@ -447,7 +447,14 @@ function mergeTraceSnapshots(previous: TraceSnapshot | null, next: TraceSnapshot
 }
 
 function traceSnapshotWithTurnStatus(trace: TraceSnapshot, turn: TraceSnapshot): TraceSnapshot {
-  const timing = mergeTraceTimingProjection(trace, turn, { preserveVisibleTerminalDuration: traceTimingWasRunning(trace) && traceTimingIsTerminal(turn) });
+  const turnTiming = traceTimingCandidate(turn);
+  const turnIsTerminal = traceTimingIsTerminal(turn) || isTerminalStatus(turn.status);
+  // Running card timing belongs to the turn status projection. Trace pages may
+  // hydrate older detail rows later; they must not move the visible running
+  // card's startedAt/lastEventAt source and create multi-second jumps.
+  const timing = !turnIsTerminal && turnTiming
+    ? turnTiming
+    : mergeTraceTimingProjection(trace, turn, { preserveVisibleTerminalDuration: traceTimingWasRunning(trace) && traceTimingIsTerminal(turn) });
   return {
     ...trace,
     traceId: trace.traceId ?? turn.traceId,