I have a custom post type (Plugin Types) with custom fields (Plugin ACF) that works with wpuf in frontoffice it creates and edits perfectly. But when I modify one custom post, it loops and creates thousands of custom post types based on the last one thus crashing my server.
I deactivated your plugin and it seems to come from WPUF 🙁
Try to disable load script option and see what happen. To disable the settings please navigate to User Frontend->Settings-> General Options Tab->Load Scripts = (Unmark)Load scripts/styles in all pages.