diff --git a/src/renderer/src/components/activity/ActivityPrototypePage.test.ts b/src/renderer/src/components/activity/ActivityPrototypePage.test.ts
index 4046476fae5..be5710c6ee6 100644
--- a/src/renderer/src/components/activity/ActivityPrototypePage.test.ts
+++ b/src/renderer/src/components/activity/ActivityPrototypePage.test.ts
@@ -171,6 +171,9 @@ describe('buildActivityEvents', () => {
 
     expect(result.liveAgentByPaneKey[PANE_KEY].state).toBe('monitoring')
     expect(threads[0].currentAgentState).toBe('monitoring')
+    // A monitoring turn must not emit a `working` event that contradicts the live snapshot.
+    expect(result.events).toHaveLength(0)
+    expect(threads[0].latestEvent).toBeNull()
     expect(groups[0]).toMatchObject({
       key: 'monitoring',
       label: 'Monitoring background tasks',
diff --git a/src/renderer/src/components/activity/activity-pane-events.ts b/src/renderer/src/components/activity/activity-pane-events.ts
index ea69ef13541..9170bcf8898 100644
--- a/src/renderer/src/components/activity/activity-pane-events.ts
+++ b/src/renderer/src/components/activity/activity-pane-events.ts
@@ -97,8 +97,11 @@ export function buildPaneActivityEvents(args: PaneEventInputs): ActivityEvent[]
     )
   }
 
+  // Monitoring live turns surface only via the 'monitoring' snapshot, never as a working event.
   const currentState =
-    args.liveState !== null || isHistoricalActivityState(args.entry.state) ? args.entry.state : null
+    args.liveState === 'working' || isHistoricalActivityState(args.entry.state)
+      ? args.entry.state
+      : null
   if (currentState === null || args.entry.sessionBoundary === true) {
     return events
   }