Revisions custom post statuses not showing up in dropdown

We have recently encountered a problem where the custom post statuses from the Revisions plugin are not showing up in the dropdown.

Current:
https://i.imgur.com/3GOa7Ze.png

Expected:
https://i.imgur.com/rvVHHVT.png

I have ensured that Revisions is enabled for this post type in the Revisions Settings. I have also tried disabling all other plugins, but I have not been able to figure out where this issue is stemming from yet.

Any ideas?

• This topic was modified 1 hour, 58 minutes ago by charoverflow.