You don't need to do a full wipe if you don't want to. Everything SHOULD be fine. BUT, if you have any issues, I'd recommend trying that first
Just noticed that. Easiest fix is to uninstall it, and reinstall it from the app store. I'll fix that next version.
It sounds like something like "keep awake while on usb" is enabled, but I don't think that's anywhere in the settings.....hrmm.....Well, for one, I know that USB doesn't really supply enough power to charge the phone and keep it running at the same time. It'll give it some power, but the battery will still drain...albit, at a slower rate.
What are you doing while it's plugged in? (Copying files or anything)
Is the screen turned off while its plugged in?
Try turning off USB debugging and tell me if it still happens
I've also noticed that this phone gets hot when it's under either GPU or CPU load and/or charging. A LOT hotter than the Evo V 4G...which is perfectly fine, it just may worry some people. Just remember, the phone is basically just a small computer. Heck..it's better then most "normally bought" computers from 5+ years ago, (Walmart bought ones for example) all packed into one little device. This is why I love smartphones so much, it's so incredible how they pack all this incredible hardware into such a small device, keep it from overheating, and have it run for days on just a small battery.
Sorry >.> Rambling lol.