Last year GamersNexus covered something similar. Can’t remember the exact video, but I think it was in the series of videos this one comes from m.youtube.com/watch?v=fFNi3YNJXbY&t=0s.
Can’t remember all the details, but (I think) something was causing a part of the die (I guess not near a temp sensor) to heat up way out of spec, enough to litterally melt the solder on the CPU, and have it drain out.
CPU is likely dead, and certainly not to be trusted. Is it an Asus or gigabyte motherboard? Potentially it’s one that’s affected and hasn’t had the bios update that fixes the issue applied