I am still having issues with channel changing after box is in use 30 minutes and more I change a few channels then a channel freezes. Go to another channel works go back to original channel still frozen. Have to wait a minute or so and comes back on. It flashes stream not available. I have reset twice. cleared cache numerous times. changed video player. I have high end wifi that is within 10 feet of box. You can select several channels in a row and they all freeze . That's changing will full screen or channel screen and even using last button. Anyone else experiencing this issue on the xr4000?