WALinuxAgent: [BUG] Agent breaks when deploying template with VM and runCommand

When using a Bicep template to deploy an Ubuntu VM while also doing a runCommand in the same template after the VM has been deployed, the agent completely breaks and doesn’t seem to be able to repair itself. It’s as if the agent never finishes setting up to begin with. Removing the runCommand resource from the template will make sure the agent is properly installed, and deploying the same template with runCommand after the VM has been provisioned works as it should. Restarting the walinuxagent service or the VM doesn’t help either.

waagent --version
WALinuxAgent-2.2.45 running on ubuntu 18.04
Python: 3.6.9
Goal state agent: 2.2.45

Log file keeps retrying to connect. Same thing over and over.

2022/02/28 21:14:02.183944 INFO Daemon WireServer endpoint is not found. Rerun dhcp handler
2022/02/28 21:14:02.184409 INFO Daemon Test for route to 168.63.129.16
2022/02/28 21:14:02.187106 INFO Daemon Route to 168.63.129.16 exists
2022/02/28 21:14:02.187485 INFO Daemon Wire server endpoint:168.63.129.16
2022/02/28 21:14:02.200153 INFO Daemon Fabric preferred wire protocol version:2015-04-05
2022/02/28 21:14:02.200873 INFO Daemon Wire protocol version:2012-11-30
2022/02/28 21:14:02.201970 INFO Daemon Server preferred version:2015-04-05
2022/02/28 21:14:02.362426 INFO Daemon Found private key matching thumbprint 93D0A3DD1C418BEC2457ACF4412128541581F3E5
2022/02/28 21:14:02.445277 INFO Daemon Found private key matching thumbprint 93D0A3DD1C418BEC2457ACF4412128541581F3E5
2022/02/28 21:14:02.535893 INFO Daemon Found private key matching thumbprint 93D0A3DD1C418BEC2457ACF4412128541581F3E5
2022/02/28 21:14:02.549331 ERROR Daemon Exception processing goal state, giving up: [the JSON object must be str, bytes or bytearray, not 'NoneType']
2022/02/28 21:14:02.556208 INFO Daemon WireServer is not responding. Reset endpoint
2022/02/28 21:14:02.560111 INFO Daemon Protocol endpoint not found: WireProtocol, [ProtocolError] Exceeded max retry updating goal state
2022/02/28 21:14:02.569141 INFO Daemon Protocol endpoint not found: MetadataProtocol, [ProtocolError] 404 - GET: http://169.254.169.254/Microsoft.Compute/identity?api-version=2015-05-01-preview
2022/02/28 21:14:02.577300 INFO Daemon Retry detect protocols: retry=62

Steps to reproduce.

1. Deploy VM and runCommand in the same template.
2. Deploy will get stuck forever and runCommand is never executed and agent breaks.

Template used.

param location string = resourceGroup().location
param vmName string = 'VmTestRunCmd2'
param adminUsername string = 'hadmin'
@secure()
param adminPassword string
param vnetRGName string = 'a-natfw-rg'
param vnetName string = 'a-natfw-vnet'
param subnetBackend string = 'snet-pls'

resource vnet 'Microsoft.Network/virtualNetworks@2021-05-01' existing = {
  name: vnetName
  scope: resourceGroup(vnetRGName)
}

resource networkInterface 'Microsoft.Network/networkInterfaces@2020-11-01' = {
  name: '${vmName}-nic'
  location: location
  properties: {
    ipConfigurations: [
      {
        name: 'ipconfig1'
        properties: {
          privateIPAllocationMethod: 'Dynamic'
          subnet: {
            id: '${vnet.id}/subnets/${subnetBackend}'
          }
        }
      }
    ]
  }
}

resource virtualMachine 'Microsoft.Compute/virtualMachines@2020-12-01' = {
  name: vmName
  location: location
  properties: {
    hardwareProfile: {
      vmSize: 'Standard_A2_v2'
    }
    osProfile: {
      computerName: vmName
      adminUsername: adminUsername
      adminPassword: adminPassword
    }
    storageProfile: {
      imageReference: {
        publisher: 'Canonical'
        offer: 'UbuntuServer'
        sku: '18.04-LTS'
        version: 'latest'
      }
      osDisk: {
        name: '${vmName}-OSDisk'
        caching: 'ReadWrite'
        createOption: 'FromImage'
      }
    }
    networkProfile: {
      networkInterfaces: [
        {
          id: networkInterface.id
        }
      ]
    }
    diagnosticsProfile: {
      bootDiagnostics: {
        enabled: true
      }
    }
  }
}

resource runCommand 'Microsoft.Compute/virtualMachines/runCommands@2021-07-01' = {
  name: '${virtualMachine.name}/runCommandnow'
  location: location
  properties: {
    asyncExecution: false
    errorBlobUri: 'https://anatfwlogs.blob.core.windows.net/error/error.txt'
    outputBlobUri: 'https://anatfwlogs.blob.core.windows.net/error/output.txt'
    source: {
      script: 'touch /home/hadmin/test.txt'
    }
    timeoutInSeconds: 120
  }
}