Mango lost LAN after upgrade to 2.11

Recently upgraded several Mangoes from 3.1xx to 3.211. One of them lost the LAN connection after upgrade. Solved by changing wan to lan, works great in wan port but zero connectivity on lan port on 3.211 on one specific Mango.

Suggestions? Eliminated power and physical connections.

Sorry it is a confimed bug and fixed in 3.212 GL.iNet download center

It only happens when you use some specific network card so difficult to find.

Pls upgrade and verify.