Battery stops charging while tethering

[signothefish]

My Epic stops charging while tethering. I noticed it gets a little warm, but it's not scorching hot. Turning it off makes it rechargeable. I had this problem on the Touch Pro, but didn't expect it on the Epic. Guess most smartphones are designed with protection circuitry to disable charging when it gets too hot. It happened last night as well while streaming music over WiFi, and today in the car while streaming music over 3G. It just flat out stops charging. I'm using the factory charger, as well as Samsung OEM car and travel chargers.