diff --git a/internal/cloud/server-workbench-http.ts b/internal/cloud/server-workbench-http.ts
index fb5eb98a..961f48ce 100644
--- a/internal/cloud/server-workbench-http.ts
+++ b/internal/cloud/server-workbench-http.ts
@@ -763,8 +763,9 @@ function factMessageDto(message, parts = [], facts = {}) {
   const assistantLike = isAssistantLikeRole(role);
   const checkpointStatus = assistantLike ? normalizeTerminalStatus(checkpoint?.status) : null;
   const status = normalizeStatus(checkpointStatus ?? (assistantLike ? turn?.status : null) ?? messageStatus);
-  const timingSource = assistantLike ? (checkpointStatus ? checkpoint : turn ?? checkpoint ?? message) : message;
-  const timing = factTimingProjection(timingSource, status);
+  const timing = assistantLike
+    ? factCombinedTimingProjection(status, checkpoint, turn, message)
+    : factTimingProjection(message, status);
   const text = projectionText(message?.text, message?.content, message?.message, message?.finalResponse);
   const normalizedParts = parts.length > 0
     ? [...parts].sort(compareFactPartsAsc).map((part) => factPartDto(part, messageId, traceId)).filter(Boolean)
@@ -830,7 +831,7 @@ function factTurnSnapshot({ turn = null, session = null, facts = {}, traceId, tu
   const traceStatus = normalizeTerminalStatus(trace.status);
   const status = normalizeStatus(checkpointStatus ?? traceStatus ?? turn?.status ?? session?.status);
   const finalText = projectionText(turn?.finalResponse, turn?.assistantText, turn?.text, assistantMessage?.text);
-  const timing = factTimingProjection(checkpointStatus ? checkpoint : turn ?? checkpoint, status);
+  const timing = factCombinedTimingProjection(status, checkpoint, turn, trace);
   return {
     turnId: resolvedTurnId,
     traceId: safeTrace,
@@ -960,16 +961,61 @@ function factProjectionForTrace(facts = {}, traceId) {
 function factTimingProjection(record = null, status = null) {
   const source = objectValue(record?.timing);
   const observedAt = new Date().toISOString();
-  const startedAt = timestampIso(source?.startedAt);
-  const lastEventAt = timestampIso(source?.lastEventAt);
+  const startedAt = timestampIso(source?.startedAt ?? record?.startedAt);
+  const lastEventAt = timestampIso(source?.lastEventAt ?? record?.lastEventAt ?? record?.updatedAt ?? record?.createdAt);
   const normalizedStatus = normalizeStatus(status ?? record?.status);
   const terminal = record?.terminal === true || TERMINAL_STATUSES.has(normalizedStatus) && !RUNNING_STATUSES.has(normalizedStatus);
-  const finishedAt = terminal ? timestampIso(source?.finishedAt) : null;
+  const finishedAt = terminal ? timestampIso(source?.finishedAt ?? record?.finishedAt ?? record?.completedAt) : null;
   const durationMs = elapsedFactMs(startedAt, terminal ? finishedAt : observedAt);
   const lastEventAgeMs = terminal ? null : elapsedFactMs(lastEventAt, observedAt);
   return { startedAt, lastEventAt, finishedAt, durationMs, observedAt: terminal ? null : observedAt, lastEventAgeMs, valuesRedacted: source?.valuesRedacted !== false };
 }
 
+function factCombinedTimingProjection(status = null, ...records) {
+  const normalizedStatus = normalizeStatus(status ?? records.find((record) => record?.status)?.status);
+  const terminal = TERMINAL_STATUSES.has(normalizedStatus) && !RUNNING_STATUSES.has(normalizedStatus);
+  const observedAt = new Date().toISOString();
+  const timings = records.map((record) => factTimingSource(record)).filter(Boolean);
+  const startedAt = firstTimestampIso(...timings.map((timing) => timing.startedAt));
+  const lastEventAt = latestTimestampIso(...timings.map((timing) => timing.lastEventAt));
+  const finishedAt = terminal ? latestTimestampIso(...timings.map((timing) => timing.finishedAt)) : null;
+  const durationMs = elapsedFactMs(startedAt, terminal ? finishedAt : observedAt);
+  const lastEventAgeMs = terminal ? null : elapsedFactMs(lastEventAt, observedAt);
+  return { startedAt, lastEventAt, finishedAt, durationMs, observedAt: terminal ? null : observedAt, lastEventAgeMs, valuesRedacted: true };
+}
+
+function factTimingSource(record = null) {
+  if (!record) return null;
+  const source = objectValue(record?.timing);
+  return {
+    startedAt: timestampIso(source?.startedAt ?? record?.startedAt),
+    lastEventAt: timestampIso(source?.lastEventAt ?? record?.lastEventAt ?? record?.updatedAt ?? record?.createdAt),
+    finishedAt: timestampIso(source?.finishedAt ?? record?.finishedAt ?? record?.completedAt)
+  };
+}
+
+function firstTimestampIso(...values) {
+  for (const value of values) {
+    const timestamp = timestampIso(value);
+    if (timestamp) return timestamp;
+  }
+  return null;
+}
+
+function latestTimestampIso(...values) {
+  let latest = null;
+  let latestMs = Number.NEGATIVE_INFINITY;
+  for (const value of values) {
+    const timestamp = timestampIso(value);
+    if (!timestamp) continue;
+    const ms = Date.parse(timestamp);
+    if (!Number.isFinite(ms) || ms < latestMs) continue;
+    latest = timestamp;
+    latestMs = ms;
+  }
+  return latest;
+}
+
 function elapsedFactMs(startedAt, endedAt) {
   const start = Date.parse(String(startedAt ?? ""));
   const end = Date.parse(String(endedAt ?? ""));