Ever Had an RJ45 Fail Under PoE Load? What Was the Cause?

I'm researching common failure modes of RJ45 connectors in PoE applications (especially at 60W+).

So far I've identified contact arcing, overheating, and surge damage as the top three.

What failures have you encountered in the field?

Full analysis with prevention tips here:
https://voohuelectronic-ux.github.io/voohu-rj45-guide/resources/poe-failure-prevention.html