Strange issue with setting null on kind property

[slavizh]

Bicep version
Bicep CLI version 0.33.93 (7a77c7f)

Describe the bug
I am experiencing this strange issue with Bicep template setting kind to null on a resource. To my understanding this is issue with Bicep instead of the resource.

To Reproduce
Steps to reproduce the behavior:

This template results in error:

param endpoint object = {
  name: 'ep0001'
  kind: null
}

resource endpointRes 'Microsoft.Insights/dataCollectionEndpoints@2023-03-11' = {
  name: endpoint.name
  location: resourceGroup().location
  kind: endpoint.kind
  properties: {
    networkAcls: {
      publicNetworkAccess: 'Enabled'
    }
    description: ''
  }
}

New-AzResourceGroupDeployment: 11:04:02 - Error: Code=InvalidTemplate; Message=Deployment template validation failed: 'The template resource 'ep0001' at line '23' and column '9' is not valid: Evaluation result of language expression '[parameters('endpoint').kind]' is type 'Null', expected type is 'String'.. Please see https://aka.ms/arm-functions for usage details.'.
New-AzResourceGroupDeployment: The deployment validation failed

Slightly modified template but still setting kind to null results in success:

param endpoint object = {
  name: 'ep0001'
}

resource endpointRes 'Microsoft.Insights/dataCollectionEndpoints@2023-03-11' = {
  name: endpoint.name
  location: resourceGroup().location
  kind: null
  properties: {
    networkAcls: {
      publicNetworkAccess: 'Enabled'
    }
    description: ''
  }
}

Even if I put some condition the result is still error:

param endpoint object = {
  name: 'ep0001'
  kind: ''
}

resource endpointRes 'Microsoft.Insights/dataCollectionEndpoints@2023-03-11' = {
  name: endpoint.name
  location: resourceGroup().location
  kind: empty(endpoint.kind) ? null : endpoint.kind
  properties: {
    networkAcls: {
      publicNetworkAccess: 'Enabled'
    }
    description: ''
  }
}

Additional context
Add any other context about the problem here.

[slavizh]

Same applies to Microsoft.Insights/dataCollectionRules resource.