FloatingActionButton interact with Snackbar even inside NavigationBar

[Nexen23]

If you select any menuItem in NavigationBar, FloatingActionButton will be heaved by SnackBar and will not be unheaved if you open NavigationBar again before SnackBar disappear.

There is a gif so you can understand what I am talking about.

[andremion]

I got it. What your opinion about an UX solution? What should it to do?

[Nexen23]

I literally have no good idea about how to deal with it for better design :(
Maybe X sign should move down fast (to position, where it was before Snackbar) after NavBar opened? And if Snackbar will be activated when user tap X sign, it should also move up fast and then closing CircularAnimation should appear.
It's not so great idea because it could cause other glitches so I really don't know how to handle this.