Only loading first full screen ad. Am I misunderstanding the process?

This morning I started to implement Revmob into an app. Was easy to setup and show a fullscreen test ad. However the revmob listener is only getting 2 events, “adreceived” and “adclosed”, and only getting them once. Then nothing after that. If I call RevMob.createFullscreen(revmobListener) a second time, no event fires. 

For those with experience using Rebmob:

Is this behaviour because I am using the test mode?

Perhaps I am not supposed to call createFullscreen before each show()?

Any help or enlightening on the subject would be greatly appreciated.