@mmarquis
I had the same problem with these Gen 2 laptops

Problem:
It seems like these laptops are coming with bad driver for Wired Intel I219-V Ethernet adapter
Wireless, USB to LAN or USB-C works fine for me

Solution:

• First Update BIOS on freshly out of the box laptop and then deploy your image as usual (using Ethernet LAN)
• Use USB-C or USB-to-LAN adapter to deploy your image and update BIOS afterwards

I have tested them on couple of laptops and after BIOS are updated then Ethernet LAN will work fine and you can deploy your image again using Ethernet LAN