Go to the dojo, and get a friend invite from someone. While walking towards the door, open up the friend invite. The map should appear and the friend invite should be there, too. Click yes or no but it will not go away, but the map will. You must log off to get out of this glitch. This glitch will any door that opens a map including your igloo. Here is a example of how it should look like when you click yes or no: