In a php page that I have, there is the following line:
header("Location: localhost/app_prb/inicio");
The problem is that when you execute this line, it does not throw any errors, but it loads this page (start), in the same current page. I do not know if I explain myself, but it would be something like this:
The problem is that the home page is loaded too small, and also the previous page is loaded in the background.