From the screen shots you provided, it seems that something interrupted or stopped the view navigation. The fx classes should be there only for the duration of the navigation and when it completes, the view you navigated from should have style="display: none". In your case, both views have empty style attributes. I can't be sure what is causing the issue from the screenshots alone. Is this happening only with these two views or with all views? You mentioned you have updated the AppBuilder app, what exactly have you updated?
This seems to be a front-end issue connected with Kendo UI. Can you open a support ticket and send me your app project or a sample app project that reproduces the issue? This will let me investigate the issue faster and provide a better solution.
I am looking forward to your reply.