P: Issue with Map module in OS X 10.10 (Yosemite)

On OS X 10.10 (Yosemite), the map in Lightroom's Map module is very slow to load. It takes several minutes before the first part of the map appears, and some parts don't load at all, saying instead "Sorry, we have no imagery here", even though the part in question is on Google Maps. When zooming in or out, it's the same, it takes very long to update.