Internet Radio as in an Internet Radio Player, example here?
If so, does it connect wirelessly to a router?
Buffering is a sign of a slow connection and that might mean your internet connection speed is slow. Or perhaps other devices connected to the router are taking up the bandwidth?
I have an Internet Radio which intermittently struggles with buffering , causing me to have to disengage the electric cable and resetting after which it will work for a couple of weeks if I am lucky before the problem re-emerges; I have undertaken a restore to the Factory Settings etc but the problem continues. I should add that I do not experience the same problem with my MacPro so can only deduce something is wrong with the radio .
Any suggestions appreciated.