Deployment Pane: secure param doesn't pass validation

[coin8086]

My bicep script is like the following.

@secure()
param something string

resource test 'Microsoft.Storage/storageAccounts@2023-05-01' = {
  name: 'testtesttest'
  location: resourceGroup().location
  sku: {
    name: 'Standard_LRS'
  }
  kind: 'StorageV2'
  tags: {
    sometag: something
  }
}

Note the param something is decorated by secure().

Then open the script file in VS Code and show the Deployment Pane. Put "abc" for the param "something" and click the "Validate" action button, then the following error is returned

{
  "code": "InvalidTemplate",
  "message": "Deployment template validation failed: 'The value for the template parameter 'something' at line '1' and column '278' is not provided. Please see https://aka.ms/arm-create-parameter-file for usage details.'.",
  "additionalInfo": [
    {
      "type": "TemplateViolation",
      "info": {
        "lineNumber": 1,
        "linePosition": 278,
        "path": "properties.template.parameters.something"
      }
    }
  ]
}

Here's screenshot:

Note that if I remove the secure decoration, then the validation can pass. But that's not what I want.

Besides, the secure input is not well-supported in the Deployment Pane: the input is not masked but showed clearly as plain text.