I have attached an application that allows you to replicate the bug. The execution of this test case, however, requires a web server to remedy the problem of "cross requests".
The application is conceptually very simple: it is a panel with two buttons. The first button will instantiate the view "Alfa.Beta" (a simple panel), while the second button will instantiate the view "Alfa.Beta.Gamma" (still a simple panel).
Once the application is launched, if as first thing you press the button 1 and then the button 2, everything will be error-free, and the two views will be displayed without any problems.
Now replicate the error: close the application and restart it again. This time we press the button 2 first and then the button 1. When you press button 1 will get the following error: