I have built a small test application: https://github.com/Relbot/testapp.git
if you open the initial page localhost:3000 you should see "Hier steht ein toller text" at the top of the page and below a loading state ("loading...") for 3 seconds and after this the text "dies tet hat länger gedauert zu laden" should appear.
Everything works fine if I run this on my macbook ("npm run dev").
But if I run this on a Windows Server 2019. The loading state doesn't appear. It shows nothing for 3 seconds and then the whole page with all the text is shown.
What can be the problem on the windows server?
Any help appreciated