When you click the return button on the upper left, it will trigger onPopPage, and then update _authNavState, but build() is not triggered.  If you want to really sync _authNavState, maybe you can try to change it like this. <img width="498" alt="002" src="https://user-images.githubusercontent.com/23090085/128043217-62781156-b88a-4f13-869e-23039f58d6f1.png">
When you click the return button on the upper left, it will trigger onPopPage, and then update _authNavState, but build() is not triggered.
If you want to really sync _authNavState, maybe you can try to change it like this.
