I think I’m seeing a related issue.
Pre ACF Pro v5.7.0 I was able to click on the map to set a marker (admin edit page). To remove the marker I would click on the marker icon in the top right of the map. Great!!!
But after upgrading to ACF Pro v5.7.0 the behaviour has changed. Clicking in the map only causes it to zoom in a bit. A marker does flash in the centre (and gets registered) but it does not persist on the map. I don’t know haw to remove the marker.
The default icon on the map is now a ‘move hand’.
It was working perfectly 2 days ago before the upgrade.
