I am having a strange problem with a web app I recently made using ArcGIS.com. Everything works fine until you search for an address/place in the locator. Doing so will zoom you to the address/place correctly. However the next pan/zoom/click you make causes the map window to go white and become unresponsive. The scale also seems to get messed up. I tried republishing - same problem. Everything works fine in the web map. All the map services are on ArcGIS Server and seem normal. Any ideas?
The link you provide doesn't seem to illustrate your problem. Perhaps you removed the address box. Can you create an app that shows the issue with steps on how to reproduce the problem?