ACF Pro v5.4.8
Wordpress 4.6.1
The admin UI is broken in Chrome (latest version). Works in Firefox.



Is that a select field? Or is it a post object or relationship field? What are the field settings?
Post Object. Filter by Post Type field.
That is a select2 field. What other plugins are you using? Are you using Types? If you are https://wp-types.com/forums/topic/types-and-acf-conflict/
If not, start deactivating plugins because something is causing a conflict. Look to see what JS errors are being reported, might help you narrow it down.
The only two Plugins I had installed were ACF and Types. Disabled Types and now the UI works.
Thanks.