Just a reminder: you forgot the links the used library and you don't have code tags around the posted code.
To your problem: I never got the RN-XV to work reliably using a SoftwareSerial connection. It's quite picky about serial timings, so it often gets wrong characters from the SoftwareSerial. I changed my sketch to use the hardware serial interface and my problems went away immediately.
Then you open the connection in the setup routine, sending a GET request in the loop. The GET request is made using HTTP version 1.0, which means that the connection is closed after each request. Don't move to HTTP 1.1 and leave the connection open but change your code to open a new connection for each request. This is much more reliable and the usual way to go on an embedded platform.