Classic Editor Issues

My WP editor is acting very oddly, and some of my content is not publishing correctly.

I use the classic editor and have not moved to Guttenberg, and until recently had no issues. I can’t pinpoint when this started, but as of late when I try to edit existing pages that are in draft mode, the editor box does not appear at all when the page is opened in the admin dashboard. If I publish the page and then go to edit the page then the editor is there, but of course I don’t want to have to publish a page in order to edit it.

On top of that, even when I do this, text I add to the page saves on the admin end but does not appear in the published page. However, if I add a new page and copy and paste the material from the page that is not displaying properly, then the page renders as it should.

No recent changes to speak of, and I have gone through disabling plugins, and nothing seems to make any difference.

I’ve tried to do some searches online but have not found this particular problem. I don’t know if the recent WP updates somehow caused this issue.

As a follow-up, some of my active pages are not working properly with the editor either. I went to edit a page, which yesterday I edited and had only one item in the editor, a button created through a third-party app called Everbutton. So if you went to the page, the only thing that showed up was the page title and the button. Today I added one line of text, but despite saving the page several times the text does. not appear. When I inspected the page, it showed there was no “section” class within the main div, and that section class is where the article body would reside. There is only the header within the div which contains the page title, and the button container and the footer container. So something is preventing or stripping any text from the page itself.

I copied all the text from this page and added a new page. Once I saved that draft, I could no longer access the editor, but when I viewed the page, the added text was there, and the button I had styled but that did not appear correctly now showed up with the proper styling (I have this question as part of another thread I had reactivated).

The page I need help with: [log in to see the link]