Power Portal web page loading issue and js injection

[Pigi86]

Hello people,

I am having the following problem with my portal. Anytime that I change the HTML in the designer, it is injecting 2 js libraries in the bottom of the code, preform.bundle.js and app.bundle.js:

And when I preview my portal, it takes some time to totally loading the hold page, and looking the browser console I saw these errors:

It is trying to load those js that inject the designer (with 404 error) and I think that is causing the slow loading of my portal.

Any ideas/solution for this?

Thanks.