You originally posted in the Classic Pronto Forum. This remote targets the Pronto Professional Forum. I have moved the thread.
This could be a Wifi unit on the remote going bad but before you ditch it, can you give us some more information about your setup.
The symptoms you describe almost sound like something on your network is stealing your IP address.
Do you use RFX9400/RFX9600? Are you in Standalone or Network mode? What type of router? Is your remote using DHCP or fixed IP address? What is the DHCP range of your router?
Finally, have you reviewed the thread "If you think you have a network problem" by GoPronto?[Link: remotecentral.com]