fix

Assets/Darkmatter/Code/Features/ColorbookFlow/System/ColorbookFlowController.cs

@@ -50,12 +50,21 @@ public class ColorbookFlowController : IAsyncStartable, IDisposable
     public async UniTask StartAsync(CancellationToken cancellation = new CancellationToken())
     {
         _scopeCts = CancellationTokenSource.CreateLinkedTokenSource(cancellation);
+        // Grab the token value up front. If the scope is torn down (scene unload) while the
+        // init below is in flight, the await resumes during disposal — when _scopeCts is already
+        // disposed and its .Token getter would throw ObjectDisposedException. The captured struct
+        // stays safe to read.
+        var ct = _scopeCts.Token;
         _returnToMainMenuSubscription = _bus.Subscribe<ReturnToMainMenuSignal>(OnReturnToMainMenu);
         _loadingScreen.SetProgress(1f);
-        await _drawingCatalog.InitializeAsync(cancellation);
+        await _drawingCatalog.InitializeAsync(ct);
+        // scope disposed mid-init; nothing left to do. Check the external token too — it's the
+        // one VContainer cancels on teardown, and the linked _scopeCts may lag the callback order.
+        if (cancellation.IsCancellationRequested || ct.IsCancellationRequested) return;
+
         if (!_navigatingToGameplay) _loadingScreen.Hide();
 
-        PrewarmInterstitialAdAsync(_scopeCts.Token).Forget();
+        PrewarmInterstitialAdAsync(ct).Forget();
     }
 
     private async UniTaskVoid PrewarmInterstitialAdAsync(CancellationToken ct)