Since it's a reactive application, I can only debug the page events to try to see what happens. When copy/pasting the URL in a new tab, the breakpoints are not triggered.
I did however remove the Splash Screen of our application, and it seems like the problem disappeared. After adding the splash screen back in, the problem did not come back. Sounds a bit like the mystery of Yousef Shraim.
I will keep you posted!
The issue is indeed resolved by removing the Splash Screen. Sounds like a little bug.