It is a known limitation of the driver
Xircom PCMCIA Ethernet Adapter Issues
Has anyone tested CBE2 with NEC VesaLite ? (TeeJin)
Date: 2000, Jun 09
From: David Hinds <email@example.com>
The tulip_cb driver shouldn't be able to gracefully recover from a
suspend. So I'm not sure why it is working on your Thinkpad...
to: "It is a known limitation of the driver"