Nstream loses connection with Unitiserve

Since i upgraded to IOS7 and the latest nstream version, whenever i goto Nstream i have to wait about 15 secs for it to find my unitiserve. Once it has it then it is fine but if i then switch to another application and then go back to Nstream. It has lost the connection and again i have to wait. 

On ios6 and the earlier nstream i never had this problem. I'm getting really fed up!!!!