UIActivityViewController.excludeActivityTypes does not work sometimes

I call a share sheet from React Native.
It's seemingly working fine.
But excludeActivityTypes may not work properly after the second time.

What's wrong with my code?

Sorry for my poor English.

@objc(NativeModuleShare)
class NativeModuleShare: NSObject, RCTBridgeModule {
  static func moduleName() -> String!{
    return "NativeModuleShare";
  }
  
  static func requiresMainQueueSetup () -> Bool {
    return true;
  }
  
  @objc
  func ShowShareSheet(_ title:String, message:String, url:String)->Void {
  
    let itemSource = ShareActivityItemSource(shareImage: UIImage(named: "logoBgWhite")!, shareText: message, shareTitle: title, shareUrl: url)
    
    
    let activityVC = UIActivityViewController(activityItems: [itemSource, itemSource.shareText],
                                              applicationActivities: nil)
    
    let excludeActivityTypes = [
      UIActivity.ActivityType.postToTwitter,
      UIActivity.ActivityType.postToFacebook
    ]
    activityVC.excludedActivityTypes = excludeActivityTypes;
    
    DispatchQueue.main.async {
      (UIApplication.shared.delegate as? AppDelegate)?.window.rootViewController?.present(activityVC, animated: true, completion: nil);
    }
  }
}