Odd battery charging issue

[Silent_Patriot]

I have noticed that the battery charge LED on my XV6800 will intermittently change from green, indicating a full charge, to flashing orange when connected to USB and tethering. The power meter indicates that it is not charging the battery when this happens, then within a few minutes it will switch back to charging again. This usually happens once or twice a day and I've only noticed it happen after it has reached a full charge.

Is it possible that the battery is overheating and this is by design, or is something wrong? The bottom of the unit is rather warm when it occurs. Has anyone else had the same issue?

Running PPCGeeks 19588 kitchen with 3.42.30 radio.