POE LAN network interface not detected - M2X extension board + VIM3L

VIM3
11

I just found something on the M2x EXT Listing:

* Only x1 NIC can be used at one time, either the 100mb/s RJ-45 port on the M2X, or the 1000mb/s RJ-45 port on the VIM3.

Maybe that is the reason?