diff --git a/NucleicRemote/NucleicRemote/LiveActivityManager.swift b/NucleicRemote/NucleicRemote/LiveActivityManager.swift
index 14b2c9b..73dddd9 100644
--- a/NucleicRemote/NucleicRemote/LiveActivityManager.swift
+++ b/NucleicRemote/NucleicRemote/LiveActivityManager.swift
@@ -195,6 +195,12 @@ final class LiveActivityManager {
     /// bridge setup; the guards keep a single observer each.
     func beginPushToStartObservation() {
         guard ActivityAuthorizationInfo().areActivitiesEnabled else { return }
+        // Grab an activity that already exists when we start observing — e.g. one a Mac push-started
+        // while the app was closed, which won't re-emit through `activityUpdates` for a late observer.
+        // This is what lets a background "adopt" wake harvest and forward its update token.
+        if activity == nil, let existing = Activity<NucleicSessionAttributes>.activities.first {
+            adopt(existing)
+        }
         if pushToStartObservation == nil {
             pushToStartObservation = Task { [weak self] in
                 for await data in Activity<NucleicSessionAttributes>.pushToStartTokenUpdates {