Ipeng needs Duet controller to stay connected

I have an odd problem. It seems that unless my Duet’s controller is on, iPeng wont find the receiver.

I realize that the controller is needed to setup the Duet. However, I would like to box the controller after setup and strictly use iPeng thereafter. But after about half a day or so, iPeng will then loose connection to the receiver until I simply turn on the Controller, then iPeng will auto connect to the receiver.

Anyway I can achieve this?