Hej,
I have the same issue with the Elementor form within the dashboard. Also my ACF frontend form doesn’t update from the dashboard. Strange thing is, it worked the first day. But since the second day it doesn’t work anymore (date 9th of july 2020).
I first thought it was acf, but when I saw that the Elementor form also doesn’t function it could be whitelabel CMS.
Please let me know if described problems are familiar for you guys and how to solve it.
With kind regards, Paul Hendriks