CMS Collection has vanished

I had a CMS collection called “product” and it’s vanished. I’m still able to access those pages on my site (Donation Pages) but i can’t see or edit them in my editor.

You can still see it in my other editor: link

I was editing it earlier today, left and when i refreshed the page it was gone. I have no idea where it went.

Here is my public share link: LINK
(how to access public share link)

It seems to be appearing in the designer fine-