Functions missing in production slot after deploying to staging slot

Question

I have a function app with 2 slots - staging and production. Both staging and production slots have some functions.

I have the following YAML task to deploy to staging deployment slot:

- task: AzureFunctionApp@1
  displayName: 'deploy ${{ parameters.name }} function app (staging)'
  inputs:
    appType: 'functionapp'
    azureSubscription: sub
    appName: 'appname'
    Package: 'name.zip'
    deploymentMethod: 'runFromPackage'
    deployToSlotOrASE: true
    slotName: 'staging'
    resourceGroupName: 'rg' 

After deployment I see functions inside staging slot but I see NO functions (or ONLY one function with the same name as function app) inside production slot. What am I missing?

UPDATE:

I have the following resources in bicep file before the above YAML step:

resource functionApp 'Microsoft.Web/sites@2018-02-01' = {
  name: name
  location: location
  kind: kind
  properties: {
    serverFarmId: resourceId('Microsoft.Web/serverfarms', servicePlanName)
    clientAffinityEnabled: false
    httpsOnly: true
    siteConfig: {
      use32BitWorkerProcess : false
      appSettings: secretSettings
    }
  }
  identity: {
    type: 'SystemAssigned'
  }
}

resource functionAppSlot 'Microsoft.Web/sites/slots@2018-11-01' = {
  name: name
  kind: kind
  location: location
  properties: {
    clientAffinityEnabled: true
    enabled: true
    httpsOnly: true
    serverFarmId: resourceId('Microsoft.Web/serverfarms', servicePlanName)
    siteConfig: {
      use32BitWorkerProcess : false
      appSettings: secretSettings
    }
  }
  identity: {
    type: 'SystemAssigned'
  }
}

While creating the function app, does it delete all the existing functions in production slot?

Answer 1

I fixed this issue using command line:

func azure functionapp publish <FunctionAppName>

More information here