The X theme elements were not collapsed. It is only the slider is collapse upon page loads. The elements in the slider were initially for the fade animation which comes from the right side. And your slider layout is set as a fullwidth banner. You might need to change it to fullscreen, set the minimum height of
100vh and enable the slider loader. You should be seeing a loader in a fullscreen while the page is loading.
If you can give use some access to your site, we can check your slider settings.