ESP32 Internal Short Circuit Hello Hivemind,

I've ordered a few bare-metal ESP to get them soldered on a custom PCB.  
Out of 6, 1 didn't work at all, and one recently stopped working after a failed flash attempt. Some testing with my trusty multimeter, found that both the devices had a short from 3,3v  rail to ground. I then disconnected the 3,3v line on the pcb via knife, and was that way able to determine that the short has to be in the ESP32 itself. Does anybody have an idea what could cause such a thing?