We are experiencing the same issue where when we try to save a new repeater, all the field disappear on the first save, then we have to do it again for them to show.
The in our option page, the repeater data are not saving, it looks like there is something going on with the latest version of the plugin. I am also using Version 5.8.9 of ACF PRO and the latest version of WordPress.
Any ideas ?
Thanks,
