also change your dns, i see you are using the older name servers which includes the flaky PIA name servers (209.222.x.x) which maybe causing the intermittent lookup failure, the default list of NAME_SERVERS should now be set as:-
84.200.69.80,37.235.1.174,1.1.1.1,37.235.1.177,84.200.70.40,1.0.0.1