Microsoft.Network/firewallPolicies - WhatIf noise

[janegilring]

Describe the noise

ipv6rule: false is shown as being removed, although no such property can be configured in the API nor the portal.

Resource type (i.e. Microsoft.Storage/storageAccounts)
Microsoft.Network/firewallPolicies

apiVersion (i.e. 2019-04-01)
2023-04-01

Client (PowerShell, Azure CLI, or API)
PowerShell

Relevant ARM Template code (we only need the resource object for the above resourceType and apiVersion, but if it's easier you can include the entire template

module firewallPolicy 'br/public:avm/res/network/firewall-policy:0.1.3' = {
  name: 'firewallPolicyDeployment'
  params: {
    // Required parameters
    tier: 'Premium'
    name: 'azfwpolicy-norwayeast'

    // Non-required parameters
    allowSqlRedirect: false
    autoLearnPrivateRanges: 'Enabled'
    enableProxy: true
    servers: [
      '10.48.12.68'
    ]
    location: location
    ruleCollectionGroups: [
      //************************** Rule Collection Group RCG-Internet start ************************************
      {
        name: 'RCG-Internet'
        priority: 1000
        ruleCollections: [
          //************************ Network Rule Collection NRC-Internet start **********************************
          {
            action: {
              type: 'Allow'
            }
            name: 'NRC-Internet'
            priority: 1000
            ruleCollectionType: 'FirewallPolicyFilterRuleCollection'
            rules: [
              //###################### Network Rule Internet-53 start ######################################### 
              {
                destinationAddresses: [
                  '8.8.8.8'
                  '8.8.4.4'
                ]
                destinationFqdns: []
                destinationIpGroups: []
                destinationPorts: [
                  '53'
                ]
                ipProtocols: [
                  'TCP'
                  'UDP'
                ]
                name: 'Internet-53'
                ruleType: 'NetworkRule'
                sourceAddresses: []
                sourceIpGroups: [
                  AzureLZnetworks
                ]
              }
              //###################### Network Rule Internet-53 end  ##################################################
              //###################### Network Rule Internet-443 start ######################################### 
              {
                destinationAddresses: [
                  '*'
                ]
                destinationFqdns: []
                destinationIpGroups: []
                destinationPorts: [
                  '443'
                ]
                ipProtocols: [
                  'TCP'
                  'UDP'
                ]
                name: 'Internet-443'
                ruleType: 'NetworkRule'
                sourceAddresses: []
                sourceIpGroups: [
                  AzureLZnetworks
                ]
              }
}

Expected response (i.e. "I expected no noise since the template has not been modified since the resources were deployed)
I expected no noise since the template has not been modified since the resources were deployed

Current (noisy) response (either include a screenshot of the what-if output, or copy/paste the text)

ipv6rule: false

Additional context
Add any other context about the problem here.