Hi,
The known problem with custom roles is missed user levels:
https://www.role-editor.com/wordpress-user-levels-deprecated-just-partially/
If your custom role does not include “deprecated” user levels try to turn on the same levels set as an “Author” role contains. May be it will help you to resolve a problem.
In other case I need “Wishlist Member” plugin copy to test it and find a reason of described problem. You may send it to [email protected]
