First thank you so much for such amazing plugin!
I have been using it a lot in many websites without problem before, but now I have installed it in a friend website’s, and after creating some custom fields, all of them are shown in a vertical line to the left, and I can not see them, nor re order them, nor drag & drop them.
Wordpress Version: 5.3.2
ACF version: 5.8.9
no worries about the porblem.
Finally I deactivated the plugin and I solved the problem in another different way.