diff --git a/scripts/src/hwlab-node-web-observe-analyzer-source.ts b/scripts/src/hwlab-node-web-observe-analyzer-source.ts
index 979ac3b0..7aa718a4 100644
--- a/scripts/src/hwlab-node-web-observe-analyzer-source.ts
+++ b/scripts/src/hwlab-node-web-observe-analyzer-source.ts
@@ -1742,6 +1742,12 @@ function sessionInvariantCanarySessionIds(control) {
   const ids = new Set();
   for (const row of control || []) {
     const detail = objectValue(row?.detail);
+    if (row?.type === "newSession" && row?.phase === "completed") {
+      const sessionId = stringOrNull(detail.sessionId)
+        ?? stringOrNull(detail.result?.sessionId)
+        ?? stringOrNull(detail.createSession?.createdSessionId);
+      if (sessionId) ids.add(sessionId);
+    }
     const canarySessionId = stringOrNull(detail.canarySessionId);
     if (canarySessionId) ids.add(canarySessionId);
   }
@@ -2373,9 +2379,10 @@ function compactApiDomLagForOutput(report) {
   };
 }
 
-function detectWorkbenchInPlaceProjectionLag(samples, network) {
-  const terminalTraceMissing = detectWorkbenchTerminalTraceMissing(samples);
-  const terminalApiDomLag = detectWorkbenchTerminalApiDomLag(samples, network);
+function detectWorkbenchInPlaceProjectionLag(samples, network, control = []) {
+  const canarySessionIds = sessionInvariantCanarySessionIds(control);
+  const terminalTraceMissing = detectWorkbenchTerminalTraceMissing(samples, canarySessionIds);
+  const terminalApiDomLag = detectWorkbenchTerminalApiDomLag(samples, network, canarySessionIds);
   return {
     terminalTraceMissing,
     terminalApiDomLag,
@@ -2383,12 +2390,13 @@ function detectWorkbenchInPlaceProjectionLag(samples, network) {
   };
 }
 
-function detectWorkbenchTerminalTraceMissing(samples) {
+function detectWorkbenchTerminalTraceMissing(samples, canarySessionIds = new Set()) {
   const budgetMs = Number.isFinite(Number(alertThresholds.sameOriginApiSlowMs)) ? Number(alertThresholds.sameOriginApiSlowMs) : 10_000;
   const rows = [];
   const open = new Map();
   const sortedSamples = (Array.isArray(samples) ? samples : [])
     .filter(isWorkbenchPathSample)
+    .filter((sample) => workbenchSampleMatchesCanarySessions(sample, canarySessionIds))
     .slice()
     .sort((a, b) => Date.parse(a?.ts || "") - Date.parse(b?.ts || ""));
   const closeSegment = (key, lastSample = null) => {
@@ -2446,11 +2454,12 @@ function detectWorkbenchTerminalTraceMissing(samples) {
   return rows;
 }
 
-function detectWorkbenchTerminalApiDomLag(samples, network) {
+function detectWorkbenchTerminalApiDomLag(samples, network, canarySessionIds = new Set()) {
   const windowMs = 30_000;
   const budgetMs = Number.isFinite(Number(alertThresholds.sameOriginApiSlowMs)) ? Number(alertThresholds.sameOriginApiSlowMs) : 10_000;
   const sampleRows = (Array.isArray(samples) ? samples : [])
     .filter(isWorkbenchPathSample)
+    .filter((sample) => workbenchSampleMatchesCanarySessions(sample, canarySessionIds))
     .map((sample) => ({ sample, tsMs: Date.parse(sample?.ts || ""), pageKey: samplePageKey(sample) }))
     .filter((item) => Number.isFinite(item.tsMs))
     .sort((a, b) => a.tsMs - b.tsMs);
@@ -2462,6 +2471,7 @@ function detectWorkbenchTerminalApiDomLag(samples, network) {
   }
   const terminalEvents = (Array.isArray(network) ? network : [])
     .map(compactWorkbenchTerminalApiEvent)
+    .filter((item) => workbenchTerminalEventMatchesCanarySessions(item, canarySessionIds))
     .filter((item) => item !== null);
   const overBudget = [];
   for (const event of terminalEvents) {
@@ -2513,6 +2523,19 @@ function detectWorkbenchTerminalApiDomLag(samples, network) {
   };
 }
 
+function workbenchSampleMatchesCanarySessions(sample, canarySessionIds) {
+  if (!(canarySessionIds instanceof Set) || canarySessionIds.size === 0) return true;
+  const sessionIds = [sample?.routeSessionId, sample?.activeSessionId].filter(Boolean).map(String);
+  return sessionIds.some((id) => canarySessionIds.has(id));
+}
+
+function workbenchTerminalEventMatchesCanarySessions(event, canarySessionIds) {
+  if (!event) return false;
+  if (!(canarySessionIds instanceof Set) || canarySessionIds.size === 0) return true;
+  const eventSessionIds = Array.isArray(event.sessionIds) ? event.sessionIds.map(String) : [];
+  return eventSessionIds.some((id) => canarySessionIds.has(id));
+}
+
 function compactWorkbenchTerminalApiEvent(item) {
   if (!item || item.type !== "response" || item.observerInitiated === true) return null;
   const summary = objectValue(item.bodySummary);
@@ -2771,7 +2794,7 @@ function buildFindings(samples, control, network, errors, sampleMetrics, promptN
   const traceTerminal = samples.some((item) => Array.isArray(item.traceRows) && item.traceRows.some((row) => isTerminalTraceText((row.status || "") + " " + (row.textPreview || ""))));
   const traceSeen = samples.some((item) => Array.isArray(item.traceRows) && item.traceRows.length > 0);
   if (traceSeen && !traceTerminal) findings.push({ id: "trace-without-terminal", severity: "amber", summary: "trace rows were visible but no terminal status was sampled", firstTraceSample: ref(samples.find((item) => Array.isArray(item.traceRows) && item.traceRows.length > 0)) });
-  const workbenchInPlaceProjectionLag = detectWorkbenchInPlaceProjectionLag(samples, network);
+  const workbenchInPlaceProjectionLag = detectWorkbenchInPlaceProjectionLag(samples, network, control);
   if (workbenchInPlaceProjectionLag.terminalTraceMissing.length > 0) findings.push({
     id: "workbench-terminal-trace-not-hydrated-in-place",
     severity: "red",