All gRPC calls through istio-ingressgateway fail with code "Unimplemented"

1

I’ve read a similar issue in #23720: gRPC Ingress with wildcard host match returns "Unimplemented" on client side · Issue #27320 · istio/istio · GitHub ; however, in the github issue, the root cause is using a wildcard in the VirtualService host section. I do not use wildcards; my Gateway and VirtualServices are as follows:

---
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: lh-gateway
  namespace: default
spec:
  selector:
    istio: ingressgateway
  servers:
  - port:
      number: 80
      name: grpc-all
      protocol: GRPC
    hosts:
    - "lh.demo.littlehorse.cloud"
  - port:
      number: 80
      name: grpc-0
      protocol: GRPC
    hosts:
    - "lh-0.demo.littlehorse.cloud"
  - port:
      number: 80
      name: grpc-1
      protocol: GRPC
    hosts:
    - "lh-1.demo.littlehorse.cloud"
  - port:
      number: 80
      name: grpc-2
      protocol: GRPC
    hosts:
    - "lh-2.demo.littlehorse.cloud"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: lh-server
  namespace: default
spec:
  hosts:
  - "lh.demo.littlehorse.cloud"
  gateways:
  - lh-gateway
  http:
  - route:
    - destination:
        port:
          number: 5000
        host: lh-server.default
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: lh-server-0
  namespace: default
spec:
  hosts:
  - "lh-0.demo.littlehorse.cloud"
  gateways:
  - lh-gateway
  http:
  - match:
    - port: 5000
    route:
    - destination:
        port:
          number: 5000
        host: lh-server-0.default
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: lh-server-1
  namespace: default
spec:
  hosts:
  - "lh-1.demo.littlehorse.cloud"
  gateways:
  - lh-gateway
  http:
  - match:
    - port: 5000
    route:
    - destination:
        port:
          number: 5000
        host: lh-server-1.default
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: lh-server-2
  namespace: default
spec:
  hosts:
  - "lh-2.demo.littlehorse.cloud"
  gateways:
  - lh-gateway
  tcp:
  - match:
    - port: 5000
    route:
    - destination:
        port:
          number: 5000
        host: lh-server-2.default

All attempts to make a gRPC request to lh.demo.littlehorse.cloud result in the following error:

Failed to connect: rpc error: code = Unimplemented desc = 2023/02/10 17:43:15 rpc error: code = Unimplemented desc =

Is there a bug in my virtualservice definition?

I have tried replacing the http section with tcp in the VirtualServices (and using tcp as the protocol in the Gateway) but the behavior is the same.

Thank you in advance.