diff --git a/src/main/runtime/orca-runtime-schedule-mobile-session-tabs-changed.ts b/src/main/runtime/orca-runtime-schedule-mobile-session-tabs-changed.ts
index 7ad872c2a65..f3cf8ba2fb2 100644
--- a/src/main/runtime/orca-runtime-schedule-mobile-session-tabs-changed.ts
+++ b/src/main/runtime/orca-runtime-schedule-mobile-session-tabs-changed.ts
@@ -34,6 +34,8 @@ export class OrcaRuntimeWithScheduleMobileSessionTabsChanged extends OrcaRuntime
   }
 
   protected notifyMobileSessionTabsChangedNow(worktreeId: string, changeSequence: number): void {
+    const diagnosticSnapshot = this.mobileSessionTabsByWorktree.get(worktreeId)
+    console.info('[paired-host-tab-delivery] ' + JSON.stringify({ phase: 'notify', worktreeId, changeSequence, listeners: this.mobileSessionTabListeners.size, epoch: diagnosticSnapshot?.publicationEpoch, version: diagnosticSnapshot?.snapshotVersion, tabs: diagnosticSnapshot?.tabs.map(tab => tab.id) }))
     if (this.mobileSessionTabListeners.size === 0) {
       return
     }
diff --git a/src/main/runtime/rpc/methods/session-tabs-inventory.ts b/src/main/runtime/rpc/methods/session-tabs-inventory.ts
index 5ab29ae51b5..4c928fd4588 100644
--- a/src/main/runtime/rpc/methods/session-tabs-inventory.ts
+++ b/src/main/runtime/rpc/methods/session-tabs-inventory.ts
@@ -211,6 +211,7 @@ export async function subscribeSessionTabsInventory(
   }
   const unsubscribe = runtime.onMobileSessionTabsChanged((runtimeSnapshot, changeSequence) => {
     const snapshot = runtimeSnapshot as SessionTabsChange
+    console.info('[paired-host-tab-delivery] ' + JSON.stringify({ phase: 'listener', subscriptionId, initialized, closed, changeSequence, censusChangeSequence, delivered: deliveredChangeSequenceByWorktree.get(snapshot.worktree), epoch: snapshot.publicationEpoch, version: snapshot.snapshotVersion, tabs: snapshot.tabs.map(tab => tab.id) }))
     if (!initialized) {
       bufferChange(snapshot, changeSequence)
       return
@@ -226,6 +227,7 @@ export async function subscribeSessionTabsInventory(
   runtime.registerSubscriptionCleanup(
     subscriptionId,
     () => {
+      console.info('[paired-host-tab-delivery] ' + JSON.stringify({ phase: 'cleanup', subscriptionId, initialized }))
       closed = true
       inventoryController.abort()
       unsubscribe()
@@ -273,6 +275,7 @@ export async function subscribeSessionTabsInventory(
   }
   const { inventory, changeSequence } = collected
   censusChangeSequence = changeSequence
+  console.info('[paired-host-tab-delivery] ' + JSON.stringify({ phase: 'census', subscriptionId, changeSequence }))
   emit({ type: 'snapshots', ...inventory })
   for (const snapshot of inventory.snapshots) {
     publishedSnapshotsByWorktree.set(snapshot.worktree, withoutNavigationIntent(snapshot))
diff --git a/src/renderer/src/runtime/web-session-tabs-sync/global-session-subscription.ts b/src/renderer/src/runtime/web-session-tabs-sync/global-session-subscription.ts
index f0483c0407f..8222a58ddfa 100644
--- a/src/renderer/src/runtime/web-session-tabs-sync/global-session-subscription.ts
+++ b/src/renderer/src/runtime/web-session-tabs-sync/global-session-subscription.ts
@@ -164,6 +164,10 @@ export function installGlobalSessionTabsSubscriptions({
           },
           {
             onResponse: (response) => {
+              const diagnostic = globalThis as typeof globalThis & { __pairedTabRawTrace?: unknown[] }
+              const trace = (diagnostic.__pairedTabRawTrace ??= [])
+              trace.push({ current: isCurrent(), revision: getRuntimeEnvironmentRevision(environmentId), expectedRevision: expectedEnvironmentPairingRevision, response })
+              if (trace.length > 80) trace.shift()
               if (
                 !isCurrent() ||
                 getRuntimeEnvironmentRevision(environmentId) !== expectedEnvironmentPairingRevision
diff --git a/tests/e2e/paired-remote-terminal-parked-reveal-interactivity.spec.ts b/tests/e2e/paired-remote-terminal-parked-reveal-interactivity.spec.ts
index 427cc817dc4..ee38c9eb7cd 100644
--- a/tests/e2e/paired-remote-terminal-parked-reveal-interactivity.spec.ts
+++ b/tests/e2e/paired-remote-terminal-parked-reveal-interactivity.spec.ts
@@ -482,6 +482,8 @@ test('paired client keeps revealed remote terminals interactive', async ({
   } finally {
     const frameTrace = await client.page.evaluate(() => (window as any).__pairedTabFrameTrace).catch(() => null)
     console.info(`[paired-tab-frame-trace] ${JSON.stringify(frameTrace)}`)
+      const rawTrace = await client.page.evaluate(() => (globalThis as typeof globalThis & { __pairedTabRawTrace?: unknown[] }).__pairedTabRawTrace ?? [])
+      console.info('[paired-tab-raw-trace] ' + JSON.stringify(rawTrace))
     await testInfo.attach('paired-tab-frame-trace', { body: JSON.stringify(frameTrace), contentType: 'application/json' })
     if (previousParkDelay === undefined) {
       delete process.env.ORCA_E2E_TERMINAL_PARKING_DELAY_MS