Most likely cause of your problem is that the “driver” for this relatively new ? NIC is not in the older Linux kernel, that is currently used by IPFire. As a short-term fix, simply use a second USB ethernet adapter.
Unfortunately, if this is the problem, you might need to wait for the IPFire devs to patch the driver. (It’s not easy to build a new driver on IPFire as they are cryptographically signed.)
Affraid im not that familiar with searching for driver messages, I have looked for “e10001” and “I-219V” with no result in /var/log/messages. Are there any specific strings that I can search for?