https://ci.chromium.org/p/chromeos/builders/luci.chromeos.general/CQ/b8930982225363759728:

FAIL: Lost SSH connection to chromeos4-row6-rack11-host2:22: EOF, Test did not finish

Device logs suggests that the USB port and/or the Ethernet dongle may be bad.

[  802.883339] smsc75xx 3-1:1.0 eth0: unregister 'smsc75xx' usb-ff580000.usb-1, smsc75xx USB 2.0 Gigabit Ethernet
[  802.939052] usb  (unregistered net_device): Failed to write reg index 0x0000002c: -19
[  802.939071] usb  (unregistered net_device): Error writing DP_ADDR
[  802.939084] usb  (unregistered net_device): Failed to write reg index 0x00000060: -19
[  802.939100] usb  (unregistered net_device): Error writing RFE_CRL

This causes device probe to fail, which in turn causes the image to crash (which is another bug).