Pete, you seem to be the only Adobe person taking any note of this issue. This is a serious problem for many of us. Can you provide some update on the status of an Adobe response.
Indeed, i'm having it on both Windows 10 creators update as MacOS 10.12.5. On both machines it appears with the latest LR update. https://youtu.be/wZ8rmDGOg-Y
Addendum: dragging a photo onto the map, it takes the software around 12-15 seconds to 'locate' the GPS and append the 'geotag' icon to the image in Lightroom; I have 200+ images to geotag in my current session, so that's ~50 minutes of waiting for the item to be geotagged (15 secs * 200 images = 3000 seconds). Unbelievable.