The Details popup in Maker isn't closing

The Map Details popup is not closing... When I am in Maker! and click the Details button above my map, the popup for adding descriptions appears. I type a description and click Done, but nothing happens. I cannot close the window using the X button either. I can still type/edit text, but other than that, the popup in unresponsive and cannot close, thus not brining me back to my map (unless I use the browser's back button, in which case my details are lost).