Problem confirmed.
Confirmed problem fixed by editing
/lib/systemd/system/nginx.service
so as
After=network.target nss-lookup.target
instead reads
After=network.target nss-lookup.target network-online.target
Problem confirmed.
Confirmed problem fixed by editing
/lib/systemd/system/nginx.service
so as
After=network.target nss-lookup.target
instead reads
After=network.target nss-lookup.target network-online.target