"Map not saved" error on Google Maps

I can’t seem to edit maps at all. When I attempt to, it hangs, and then eventually I get a popup that says “Map not saved”. The only thing that seems to not be saving is the position I want the map to be shown. (i.e. even though it says it’s not saved, it seems to save everything except the position of the map)

This started happening with the recent 3.6 update to WordPress. Any ideas as to what might be going on?