We created the test page and just inserted the default text element with the default text, no custom text. The problem already occurred there.
Here is another screenshot. If you mark the text field, the code can be seen. Sometimes the page is also rendered normally when it is reloaded. We test it in Firefox PC, it’s ok on Mac.

Hi Ismael,

no, only elements from Enfold are loaded. We added the “Custom Widget Area” item and selected Menu. But in general, the problem occurs on several pages.