Backend Connectivity Issues

[TECHNOFAB11]

I've been having issues with the Envoy Gateway and Ingress with cilium for some months now. I'm not sure if it's cilium's or envoy's fault, envoy logs "conntrack lookup failed: Success" on every request (it always returns an error because it does not receive a response from the backend) but it's just an info log.

My issue in cilium/cilium with infos etc.:
cilium/cilium#29406

[TECHNOFAB11]

I tested around and installed Envoy Gateway and some more GatewayAPI / Ingress controllers and they all worked, so this is probably not Envoy's fault.
The "conntrack lookup failed: Success" is weird though, so I'll keep this open :D