We’re running into the same issue with our Dell XPS 13 with the USB-Ethernet adapter.
We just use Acronis+PXE.

1. Boot.
2. Press 12.
3. Boot to network.
4. Connects to the network. (I can see the adapter get a DHCP IP address from the DHCP server)
5. Gets PXE image - Acronis Snap Deploy 4 Agent.
6. Boots into Acronis environment.
7. I choose Acronis Snap Deploy 4 Master Image Creator.
8. Fails to carry over the assigned DHCP IP address that was assigned in Step 4. It just has the loopback address.
   As an alternative, Acronis Deploy 4 Master Image Creator allows me to overwrite the loopback address.
   So I enter an IP, SN, DNS, GW. Unfortunately, it doesn’t allow me to path out.

I’m not sure what the issue is. The XPS 13 + USB-Ethernet adapter is able to get an IP address during the boot process. Successfully loads the PXE environment, but fails to relay the IP.