I've used "Centreal Plus" for two websites so far and encountered a similar kind of bug:
If I switch from the frontend to a page editor via "Edit page" on the top, I often land on a completely different page editor in the backend –
image clicking "Edit page" on the "Contact" page and landing in the backend editor for the "Home" page. As I use this kind of navigation while building or editing a site a lot, it would be great if you offered a fix.
I've already reinstalled the theme via "update"; on one of the mentioned sites I'm using the Cover page, on the other not.