There are two named views in this CodePen, appContent for the main content area, and menuList for the sidemenu. It uses Firebase to support google login, which is only relevant here because it illustrates the problem:
Make sure you’re not logged in, in the app. Click ‘Log out’ on the page if it displays.
Click ‘Log in’. Log in is an OAuth Firebase re-direct.
Upon #2, when the page loads again the nav-bar and content area show for a period, before the nav-bar title transition and content actually appear. I’m not entirely sure why this happens, or how I can prevent it from happening? It looks quite bad.