title: iOS Swift Animation does not work some times
body: <p>Cant solve problem of showing animation in custom popup.
  In my app i use SwiftEntryKit to show top alert with custom view. This custom view contains animation </p>
  
  <pre><code>        UIView.animate(
          withDuration: 0.8,
          delay: 0.0,
          options: [.autoreverse, .repeat],
          animations:
          {
              let scale = CGAffineTransform(scaleX: 1.3, y: 1.3)
              self.img.transform = scale
      }, completion: nil)
  </code></pre>
  
  <p>Everything works as expected, i can show a popup with scale animation.</p>
  
  <p>But when i call exactly same popup after network call with RxSwift animation does not work. No errors no info, view just gets it scaled up 1.3 size and does not show animation. Here is part of my code with networking</p>
  
  <pre><code>        HelperAuth.makeRegister(name: name!, email: email!, password: password!)
          .observeOn(MainScheduler.instance)
          .subscribe(onNext:
              { reponse in
  
                  print(reponse)
          }, onError:
              { error in
                  MessagesManager.showRedAlerter(text: "ERRRRAR")//here is my method to show popup with animation
          }).disposed(by: coordinatorAuth.disposeBag)
  </code></pre>
  
  <p>Cant find any reason of this strange behavior.</p>