What steps did you take and what happened:

1. Created Ingress with example.com and *.example.com entries pointing to service-a
2. Created HTTPPRoxy with subdomain.example.com pointing to service-b

The requests to subdomain.example.com, returned response from service-a. Upon manually removing the wildcard entry from Ingress, requests to subdomain.example.com returned response from service-b.

Anything else you would like to add:
Slack thread: https://kubernetes.slack.com/archives/C8XRH2R4J/p1634816914004100

I was trying to create a minimal reproduction in order to report it, but it seemed to have worked properly.

Creating issue on @stevesloka request, to confirm that this area is tested properly.

Environment:

• Contour version: 1.18.2
• Kubernetes version: (use kubectl version): v1.22.2
• Kubernetes installer & version: minikube v1.23.2