Ubuntu 18.10 wifi not working at starbucks

I had this problem with 18.04. Adding an entry to /etc/hosts as mentioned in this bug report.

In 18.10, that does not work.

I get an IP assigned via DHCP, but never get the login page.

NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   address 172.31.98.25
NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   plen 23 (255.255.254.0)
NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   gateway 172.31.98.1
NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   lease time 3600
NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   hostname 'myhost'
NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   nameserver '8.8.8.8'
NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   nameserver '8.8.4.4'
NetworkManager[1026]: <info>  [1541282194.0196] dhcp4 (wlp61s0):   domain name 'home'

systemd-resolved[841]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.

Searching for the error didn't turn up anything helpful.

My phone connects to the same wifi just fine.

Thanks.