I didn't even notice a smell.
Just went to remove the USB cable
and it took the socket and a bit of the surrounding plastic away with it.
Suggests the plastic got hot enough to melt but not enough to even singe a bit.
Was it Aldi or Lidl that did the Moon Comet copies a few years ago? Those were ok, until water ingress (and being bashed and run over by mini c00ps) finally killed them.
Fire hazard then? Nice.