Checklist doesn’t save when saving draft or scheduling a post

Ever since the latest update, I haven’t been able to save changes to the checklist when I save a draft or schedule a post. I never go directly to publish on the site I’m using this plugin on (I always schedule the posts), so that may be an issue too. If I have all the boxes checked and I schedule the post, when I refresh the post’s edit page, it ends up unchecking all of the checkboxes as if they were never saved at all.

When I revert back to the previous version 1.1.1, it works fine. I’m guessing there is an issue with the AJAX Request Handling improvement that was added to the latest version.