If you visit Special:Nearby on any wiki (e.g. dewiki) and click the reload button, or alternatively the link of a returned page, you'll get the following error in your browser's console:
Uncaught TypeError: Cannot read property 'ajax' of undefined NearbyGateway._search @ NearbyGateway.js:139 NearbyGateway.getPages @ NearbyGateway.js:93 WatchstarPageList.extend._find @ Nearby.js:178 (anonymous function) @ Nearby.js:119 jQuery.Callbacks.fire @ load.php?debug=true&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=minerva&version=fBj6fuF4:3148 jQuery.Callbacks.self.fireWith @ load.php?debug=true&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=minerva&version=fBj6fuF4:3260 jQuery.extend.Deferred.jQuery.each.deferred.(anonymous function) @ load.php?debug=true&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=minerva&version=fBj6fuF4:3350 WatchstarPageList.extend.getCurrentPosition.navigator.geolocation.getCurrentPosition.err @ Nearby.js:70
The load of the page you clicked (if you clicked a link of a page) works fine, but the reload action doesn't do anything except to replace the content with a loading spinner.