BadRequest error when setting property to empty string, but setting it to null gives BCP036 in VS Code

[doubleyouvdb]

Bicep version
0.4.63

Describe the bug
Property needs to be set on 'null' instead of empty string '', otherwise the pipeline crashes with a BadRequest error. At the same time, setting it to 'null' gives a warning in Vistual Studio Code:
The property "logAnalyticsWorkspaceResourceID" expected a value of type "string" but the provided value is of type "null | string".bicep(BCP036)

Relevant code:

resource aksClusterRes 'Microsoft.ContainerService/managedClusters@2020-09-01' = {
   name: aksCluster.name
  location: resourceGroup().location
  tags: tags
  sku: {
    name: 'Basic'
    tier: aksCluster.sla
  }
  properties: {
    kubernetesVersion: aksCluster.kubernetesVersion
    addonProfiles: {
      omsAgent: {
        enabled: aksCluster.logAnalyticsWorkspace.enableContainerMonitoring
        config: {
          //needs to be set to null, not '', otherwise badRequest error:
          logAnalyticsWorkspaceResourceID: aksCluster.logAnalyticsWorkspace.enableContainerMonitoring ? logAnalyticsWorkspace.id : null
        }
      }
      ingressApplicationGateway: {
        enabled: !empty(aksCluster.network.ingressApplicationGateway.name)
        config: {
          //needs to be set to null, not '', otherwise badRequest error:
          applicationGatewayId: !empty(aksCluster.network.ingressApplicationGateway.name) ? ingressApplicationGateway.id : null
        }
      }
    }
    agentPoolProfiles: [
      agentPoolProfiles[0]
    ]
  }
}

To Reproduce
Replace both the 'null'-s in code above to '' and pipeline crashes with BadRequest error.

Additional context
Add any other context about the problem here.

[slavizh]

+1

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @qike-ms, @jwilder, @thomas1206, @seanmck. Please see https://aka.ms/biceptypesinfo for troubleshooting help.