Instance is not healthy but the deployment shows as succeeded

Issue

In an ECS deployment, the UI shows "successfully deployed" but fails health-check fail 5 seconds later. Health checks are fail but the application still shows as being deployed.The following stage for example is being utilized:

  "completeOtherBranchesThenFail": true,
  "dependsOn": [],
  "executionOptions": {
    "successful": true
  },
  "failPipeline": false,
  "name": "Deploy app Stack [dev, ........",
  "stageTimeoutMs": 900000,
  "type": "deploy"
}

The pipeline completes as succeeded but in the server group logs there are messages for failures (service unhealthy).

Cause

Ideally, the deployment should only succeed if the underlying service/task is healthy. This issue is currently being investigated further by Armory Engineering.