diff --git a/apps/ios/Sources/Location/LocationService.swift b/apps/ios/Sources/Location/LocationService.swift
index 03a199d3e196..eb851a3d71cd 100644
--- a/apps/ios/Sources/Location/LocationService.swift
+++ b/apps/ios/Sources/Location/LocationService.swift
@@ -89,6 +89,7 @@ final class LocationService: NSObject, CLLocationManagerDelegate, LocationServic
             Task { @MainActor in
                 let clock = ContinuousClock()
                 let noPromptDeadline = clock.now.advanced(by: .milliseconds(1500))
+                var activeUndeterminedDeadline: ContinuousClock.Instant?
                 var observedPrompt = UIApplication.shared.applicationState != .active
                 // A slow system prompt must not trigger the no-callback fallback. Once iOS makes
                 // the app inactive, wait until the user dismisses the prompt and the app returns.
@@ -97,15 +98,27 @@ final class LocationService: NSObject, CLLocationManagerDelegate, LocationServic
                     let applicationIsActive = UIApplication.shared.applicationState == .active
                     if !applicationIsActive {
                         observedPrompt = true
+                        activeUndeterminedDeadline = nil
                         continue
                     }
                     guard observedPrompt || clock.now >= noPromptDeadline else { continue }
                     let status = self.manager.authorizationStatus
-                    guard Self.shouldCompleteAuthorizationWait(
+                    if Self.shouldCompleteAuthorizationWait(
                         status: status,
                         requiresDeterminedStatus: requiresDeterminedStatus)
-                    else { continue }
-                    self.finishAuthorizationWait(waitID: waitID, status: status)
+                    {
+                        self.finishAuthorizationWait(waitID: waitID, status: status)
+                        continue
+                    }
+                    if observedPrompt, activeUndeterminedDeadline == nil {
+                        activeUndeterminedDeadline = clock.now.advanced(by: .milliseconds(1500))
+                    }
+                    let fallbackDeadline = activeUndeterminedDeadline ?? noPromptDeadline
+                    guard clock.now >= fallbackDeadline else { continue }
+                    self.finishAuthorizationWait(
+                        waitID: waitID,
+                        status: status,
+                        allowUndeterminedFallback: true)
                 }
             }
         }
@@ -113,16 +126,22 @@ final class LocationService: NSObject, CLLocationManagerDelegate, LocationServic
 
     nonisolated static func shouldCompleteAuthorizationWait(
         status: CLAuthorizationStatus,
-        requiresDeterminedStatus: Bool) -> Bool
+        requiresDeterminedStatus: Bool,
+        allowUndeterminedFallback: Bool = false) -> Bool
     {
-        !requiresDeterminedStatus || status != .notDetermined
+        allowUndeterminedFallback || !requiresDeterminedStatus || status != .notDetermined
     }
 
-    private func finishAuthorizationWait(waitID: UUID, status: CLAuthorizationStatus) {
+    private func finishAuthorizationWait(
+        waitID: UUID,
+        status: CLAuthorizationStatus,
+        allowUndeterminedFallback: Bool = false)
+    {
         guard self.authWaitID == waitID, let cont = self.authContinuation else { return }
         guard Self.shouldCompleteAuthorizationWait(
             status: status,
-            requiresDeterminedStatus: self.authWaitRequiresDeterminedStatus)
+            requiresDeterminedStatus: self.authWaitRequiresDeterminedStatus,
+            allowUndeterminedFallback: allowUndeterminedFallback)
         else { return }
         self.authWaitID = nil
         self.authWaitRequiresDeterminedStatus = false
diff --git a/apps/ios/Tests/LocationPermissionSummaryTests.swift b/apps/ios/Tests/LocationPermissionSummaryTests.swift
index 526b8bf8dd0d..60dc1b9c120d 100644
--- a/apps/ios/Tests/LocationPermissionSummaryTests.swift
+++ b/apps/ios/Tests/LocationPermissionSummaryTests.swift
@@ -101,6 +101,10 @@ import Testing
         #expect(LocationService.shouldCompleteAuthorizationWait(
             status: .notDetermined,
             requiresDeterminedStatus: false))
+        #expect(LocationService.shouldCompleteAuthorizationWait(
+            status: .notDetermined,
+            requiresDeterminedStatus: true,
+            allowUndeterminedFallback: true))
     }
 
     @MainActor @Test func `off mode stops significant location monitoring`() async {