My app shell disappears and reappears on page reload, why?

[jasan-s]

I used this PWA as an example using SW precache v2 in my React App and webpack. However, I am not getting the same results. My app works offline. but on page reload everything from the DOM disappears and gets fetched again, the results do come from the service worker: (see photo below). In contrast this app and thesession.org app dont even make a request on page reload. What I'm I missing?