Featured Image with Custom Post Type posts

I’ve installed the Advanced Post Creation Add-on to create custom post type posts.

In my form I’m using the “Post Image” field, with the option " Featured Image" checked (active).

It just doesn’t work. All other fields have been mapped in the “Post Creation” feed settings of the form and are submitting as expected.
Only the featured image doesn’t get saved into the custom post.

What am I missing?
Does the “Post Image” field only work with the post type “Post”, but not with custom posts?

With the Advanced Post Creation Add-On, you do not use any of the Post type fields. Be sure you are using regular fields and mapping those on the Advanced Post Creation feed.

Check the documentation here:

And if you need assistance, please contact support: