Network Adapter in Thunderbold3 Dock don't work after Kernel 4.15.0-58

I submitted a detailed question to askubuntu.com with no responses (even after a bounty)

Here are the details it included:

Currently having major issues with thunderbolt ethernet adapter.

The device is a "Razer Core X" thunderbolt eGPU enclosure which has a built in USB3 hub and gigabit ethernet port. Essentially a very powerful dock with its own GPU (utilizing the 4 lanes of PCIe on the thunderbolt port).

The same issue occurs if I use the built in ethernet port or if I plug in my own USB3 ethernet adaptor into the USB3 hub on the dock. The issue does not occur if I bypass the thunderbolt dock and plug an ethernet adaptor in directly (although this kind of defeats the purpose of the dock).

The same issue also occurs on different laptops that both use this dock. My work laptop is on 18.04 and my new personal laptop is on 20.04 and both versions of Ubuntu on both laptops have the exact same behavior.

When the ethernet fails it is no longer able to resolve DNS nor can I even ping anything on my local network, but the device still appears "connected" in the NetworkManager UI. When I toggle the connection off/on then it shows "Connecting" and stays stuck there permanently.

When I check dmesg/syslog I see the exact same bunch of errors every single time. Below is an example of the error. Here you can see in the logs I reload the driver via modprobe which causes connection to work again briefly. Then the exact same error and symptoms occur moments later:

```
[SAME ERROR REPEATED ~20 times]
[ 543.814402] xhci_hcd 0000:0c:00.0: Looking for event-dma 0000000425e6e3f0 trb-start 0000000425e6e2e0 trb-end 0000000425e6e2e0 seg-start 0000000425e6e000 seg-end 0000000425e6eff0
[ 543.815185] xhci_hcd 0000:0c:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 543.815186] xhci_hcd 0000:0c:00.0: Looking for event-dma 0000000425e6e400 trb-start 0000000425e6e2e0 trb-end 0000000425e6e2e0 seg-start 0000000425e6e000 seg-end 0000000425e6eff0
[ 543.815271] xhci_hcd 0000:0c:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 543.815272] xhci_hcd 0000:0c:00.0: Looking for event-dma 0000000425e6e410 trb-start 0000000425e6e2e0 trb-end 0000000425e6e2e0 seg-start 0000000425e6e000 seg-end 0000000425e6eff0
[ 543.815356] xhci_hcd 0000:0c:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 543.815357] xhci_hcd 0000:0c:00.0: Looking for event-dma 0000000425e6e420 trb-start 0000000425e6e2e0 trb-end 0000000425e6e2e0 seg-start 0000000425e6e000 seg-end 0000000425e6eff0
[ 543.815822] xhci_hcd 0000:0c:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
[ 543.815823] xhci_hcd 0000:0c:00.0: Looking for event-dma 0000000425e6e430 trb-start 0000000425e6e2e0 trb-end 0000000425e6e2e0 seg-start 0000000425e6e000 seg-end 0000000425e6eff0
[ 609.127969] usbcore: deregistering interface driver ax88179_178a
[ 609.128443] ax88179_178a 10-1:1.0 enx90203a1c2b65: unregister 'ax88179_178a' usb-0000:0c:00.0-1, ASIX AX88179 USB 3.0 Gigabit Ethernet
[ 609.643604] ax88179_178a 10-1:1.0 eth0: register 'ax88179_178a' at usb-0000:0c:00.0-1, ASIX AX881...

link to original (better formatted) question: https://askubuntu.com/questions/1235285/usb-ethernet-thunderbolt-errors