I guess this is a lab issue if servo cannot connect to the DUT? Maybe the connection is broken?

10/03 02:42:52.549 ERROR|            repair:0313| Failed: servod service is taking calls
Traceback (most recent call last):
  File "/usr/local/autotest/client/common_lib/hosts/repair.py", line 310, in _verify_host
    self.verify(host)
  File "/usr/local/autotest/server/hosts/servo_repair.py", line 207, in verify
    host.connect_servo()
  File "/usr/local/autotest/server/hosts/servo_host.py", line 134, in connect_servo
    'Servo initialize timed out.')
AutoservVerifyError: Servo initialize timed out.
10/03 02:42:52.555 ERROR|        servo_host:0837| Servo verification failed for chromeos4-row9-rack6-host1-servo

see: https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/79061910-chromeos-test/chromeos4-row9-rack6-host1/debug/

Causes some of the AU retry issues.