This incident has been resolved. It was caused by a recent flyctl update and only apps deployed with flyctl version v0.3.227 were affected. We have deployed a server-side workaround.

A fix has been implemented and we are monitoring the results.

We will be rolling out a fix shortly

We have identified an issue affecting newly-allocated Anycast ingress IPv6 addresses for some apps and are working to deploy a fix. These apps may experience timeouts when connecting over IPv6 (which some clients default to).