Missing Post Templates

I’ve been using WP Post Template fine for a project, now it does not show the custom post templates I have created when editing/adding a post. The widget is still visible in the sidebar though.

Strangely, the posts with custom templates assigned do still use the correct template.

I’ve disabled all plugins and even removed and reinstalled WP Post Template

Has anyone seen this before?

https://wordpress.org/plugins/wp-custom-post-template/