Hey @TAINCER
Is traffic routed to sin for ipv4, ipv6 or both?
Could you please share the output of flyio-debug header when connecting via ipv4 and ipv6:
$ curl -s -I -H "flyio-debug: doit" http://debug.fly.dev | grep flyio-debug
$ curl -6 -s -I -H "flyio-debug: doit" http://debug.fly.dev | grep flyio-debug
And ipv4/ipv6 traceroutes:
$ traceroute debug.fly.dev
$ traceroute -6 debug.fly.dev