Thank you for the clarity. Unfortunately i'm not able to replicate the issue on a fresh installations . See Screenshot
Does the issue still occur if you only have toolset access alone enabled ?
It's quite possible that there is another plugin that is conflicting with access and causing this issue. Also can you check the website console if there are any errors present?
Well, I found a solution. I set permission for Posts with Access and then I set "Use same settings as Posts" for my custom post type and now the Author dropdown works fine...
Can you recall if there were any specific permissions being applied to the custom post type where the author section wasn't showing ?
However i'm happy that you were able to resolve the issue.
Given that copying the settings of your default post type work then it would be an indication of some access permissions being set on the post type itself.
Hi, I've set exactly the same permissions for both Posts and the CPT (see images). If I activate the Access control on the CPT, the author dropdown doesn't work. If I set "Use same settings as Posts", it works.