Rollout stuck in out of sync with gRPC probe diff

[davekonopka]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

I have a gRPC app managed with ArgoCD that includes a Rollout. The Rollout gets stuck in out of sync when the image tag is updated and does not update. The live manifest shows a diff on liveness and readiness gRPC probes with an extra field service: null not present on the desired manifest.

We are using Istio with our Rollouts to do canary deploys. Istio sidecar injection is enabled for the application.

To Reproduce

Create a Rollout with an Istio sidecar enabled gRPC app container with liveness and readiness probes without service fields.

livenessProbe:
  grpc:
    port: 8082
  initialDelaySeconds: 30
  periodSeconds: 10
readinessProbe:
  grpc:
    port: 8082
  initialDelaySeconds: 30
  periodSeconds: 10

The initial Rollout will succeed and create.

Update the Rollout's image tag.

The Rollout will show a diff and go "Out of Sync" including livenessProbe.grpc.service = null and readinessProbe.grpc.service = null and not update. It will trigger a Rollout update with the same previous image tag.

Expected behavior

Updating the image tag should update the Rollout and proceed with rolling out the changed image.

Screenshots

Version

v2.14.4+3d901f2

Logs

Paste any relevant application logs here.