Trouble with wp_reset_postdata() in Admin Panel

I’m hooking into ‘edit_form_after_editor’

Check that I am dealing with a custom post type of ‘publications’

Create a number of arguments that I then run in a WP_Query

use that data to do stuff…
Then I want to reset $post back to how it was, so I run

But $post stays on the last item I had received from my new WP_Query().

What am I doing wrong? Is there a special way to reset the postdata when dealing with a custom post type?

Update:
At the beginning and end of the function I have:

At the beginning the title is the title for the custom post type I clicked on to edit, or blank if I am creating a new post.
At the end the title is always the last post from my query.