I have the most current version of the plugin installed and the most current version of WP installed on my test site. All that I can tell you is that, only ACF installed and using an unmodified version of either 2015 or 2016 theme, I cannot replicate the issue.
I did a search of all of the ACF code and there is nothing in ACF that could be setting the post status to future. You might want to open a new support ticket https://support.advancedcustomfields.com/new-ticket/
