User blog comment:Fairingrey/Thoughts 7-29-14: Partially Comprehensive List of Tips to Ranking, Sending and Slapping/@comment-25234673-20140730174534/@comment-17486224-20140730174958

Whether or not the game decides to relog you seems to be random. Restarting the app is the only guaranteed method. Otherwise, switching back and forth between the two kingdoms seems to work the best.