Touch stopping and rebuffering

I will start the Touch in the am playing local radio, after about an hour it will stop. After re-starting it may, or may not play radio successfully all day. In the evening I will play a CD and often it will re-buffer every few minutes. If I pull out the power to the Touch, wait 30 seconds and plug it back in all is fine. Wifi ? Touch buffer issues? anyone else see this?
Wifi is 2.4 ghz, direct line of site about 15 ft away, router archer ax50.

thanks