After every action in Adobe Photoshop Lightroom Maps module, the map switches to the whole world view and displays message Map is Offline. This lasts for 1-2 seconds after which maps goes back to a normal operation until the next user action.
As of now there is no resolution. Adobe acknowledged the bug and are working on a resolution. This seems to affect both, up to date and older versions of Lightroom, so it probably was caused by a server side change on either Adobe's or Google's end. I couldn't find any detailed explanation at this point, only that Adobe are looking into this...
20 June 2017
Adobe Photoshop Lightroom 6.10.1