Hi!
It took me some time to find out why I had this problem on my online site running ACF version 5.8.7 whilst there was no problem on my local site still running version 5.8.4!
I am using ACF for my online flora site, where obviously I need to place pins in many places which are out in the wild, remote from any street known to Google.
Please ACF team restore the feature of placing a “sticky” pin where I want.