Powershell CliXml序列化/反序列化丢失类型

下面的小函数显示，在序列化/反序列化操作期间，我丢失了一个参数的

Scriptblock

类型

Function CliXMLPOC ([String]$p1, [scriptblock]$p2)
{
  # $PSBoundParameters is an automatic var containing bound parameters
  Write-Host "BEFORE Members are : $($PSBoundParameters["p1"].GetType()), $($PSBoundParameters["p2"].GetType())"
  $serialized = [System.Management.Automation.PSSerializer]::Serialize($PSBoundParameters)
  $deserialized = [System.Management.Automation.PSSerializer]::Deserialize($serialized)
  Write-Host "AFTER Members are : $($deserialized["p1"].GetType()), $($deserialized["p2"].GetType())"
}

CliXMLPOC "Toto" {write-host "coucou"}

结果如下：

BEFORE Members are : string, scriptblock
AFTER Members are : string, string

有谁能解释一下，帮我找回预期的结果吗

BEFORE Members are : string, scriptblock
AFTER Members are : string, scriptblock

---

我99%肯定这是一个错误。我可以重新创建问题，但找不到解决方法。我已经提交了一个错误报告来连接，所以请随意添加更多信息。该错误仍然存在于PowerShell V5.0中