The camera is stuck for a moment when loading the model

I use Entity.loadAsync to load the USDZ. The camera is stuck for a moment when loading the model.

var cancellable: AnyCancellable? = nil
    cancellable = Entity.loadAsync(contentsOf: Bundle.main.url(forResource: "vyygabbj_afr", withExtension: "usdz")!)
      .sink(receiveCompletion: { error in
        DispatchQueue.main.async {
         cancellable?.cancel()
         cancellable = nil
        }
      }, receiveValue: { [weak self] ey in
        guard let self = self else { return }

        self.modelEy = ModelEntity()
        self.modelEy.addChild(ey)

        self.rootAnchor.addChild(self.modelEy)
        ey.availableAnimations.forEach {
          ey.playAnimation($0.repeat())
        }

        DispatchQueue.main.async {
          cancellable?.cancel()
          cancellable = nil
        }
    })