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by samatcloudflare 2123 days ago
Hi - Argo Tunnel creates AAAA records, but will still return IPv4 addresses. Tunnels with those records will still work on IPv4-only networks.

Can you test by running `dig +short foo.app.com`

and confirm that you get IPv4 records? It is potentially another issue with the site or Cloudflare's Happy Eyeballs feature at play; happy to help debug that as well.