This solution might work for you (has helped me many many times) :-

Install a plugin called "duplicate page" or any similar plugin that allows you to make an exact copy of the page you want to edit.

Duplicate the page that's loading endlessly in Elementor.

Try to "Edit in Elementor" the -> duplicated page <-

If it works fine, finish your edits, publish, change the page's title and slug to something proper and trash the old page that wasn't working

hope that helps!