Strange edit issue since update

Hi there,

Bit of a strange issue and I’m wondering if anyone else has experienced it.

Since updating to 4.0, two editors on our site are often getting a strange stripped down page instead of a full editor. It seems to occur on posts that have been already edited a number of times. So far, I have been unable to replicate the problem on other accounts.

When they go to edit a post as normal, instead of the editor they see a mostly empty page featuring boxes for “Title” “Display Template” “Taxonomy” & “Category”. Screenshot: https://imgur.com/fk9VmYe

I haven’t found anyone else experiencing this and since it is only happening their accounts, I can’t properly begin to tinker around and try to tackle it. Any ideas?

Thanks in advance