I used a micro usb from my nVidia Shield high quality cable. I don't see any burns on the Daisy Seed, the thing gets hot as hell to hot to touch so maybe I had a fluke. Or I could be the fluke.
The one I had that died was somewhat randomly like that as well. I assumed it was because I had just plugged it into the PCB with power applied, but I had done that at least a hundred times before with no issues.... so maybe it was just a fluke.