I installed a brand new RB4011 at a customer location. Later that same day I started getting alerts that the location was offline. I returned to the site today and the RB4011 was insanely hot and would not boot. It had a power led but no link lights on any port. It was plugged into a surge protected PDU and was powered with the OEM power supply. I opened the case to look for any visible issues and right away I noticed one of the RTL8367 Switch Chips had a meltdown! If I plug it back in it instantly starts cooking the RTL8367.

Anyone else ever encounter this?

Based on photos, this looks like an overvoltage, however, without full inspection we are unable to provide any additional details, this is very specific case. Please write to support@mikrotik.com and refer to this post.

Seen this happen on other networking kits where power was supplied to Ethernet ports that should not be getting power yes.

Looks like lightning damage to Port4.

Looks like lightning damage to Port4.

In this case only port 1 and port 6 were used.
WAN=1
LAN=6

Mikrotik has instructed me to RMA so they can inspect it further. Replacement 4011 plugged in the exact same way and configured the same has been working flawlessly.