Receive-Job Output JSON Serializer fails

I am running a Start-Job which returns a nested hashtable. This table/object can contain nested arrays or nested hashtables or even hashtables in arrays. When i try to serialize it using the "New-Object System.Web.Script.Serialization.JavaScriptSerializer", I get the following error: "A circular reference was detected while serializing an object of type  'System.Management.Automation.PSParameterizedProperty'."

Here is my code:

[void] ([System.Reflection.Assembly]::LoadWithPartialName("System.Web.Extensions"))

$sscript = {
Write-Output -InputObject @(@{name= "maros"},@{name= "Peter"})
}

$j = Start-Job  -ScriptBlock $sscript | Wait-Job | Receive-Job 

$javaScriptSerializer = New-Object System.Web.Script.Serialization.JavaScriptSerializer
$javaScriptSerializer.MaxJsonLength = [System.Int32]::MaxValue
$javaScriptSerializer.RecursionLimit = 99
$javaScriptSerializer.Serialize($j)

results in :

Exception calling "Serialize" with "1" argument(s): "A circular reference was detected while serializing an object of type 
'System.Management.Automation.PSParameterizedProperty'."
At C:\Users\takacm\AppData\Local\Temp\1a3fa01e-7904-4697-a682-ec12bb2d7625.ps1:13 char:1
+ $javaScriptSerializer.Serialize($j)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : InvalidOperationException
 

However, replacing $j with the same input as the script block output does not throw any error and works as expected !

$javaScriptSerializer = New-Object System.Web.Script.Serialization.JavaScriptSerializer
$javaScriptSerializer.MaxJsonLength = [System.Int32]::MaxValue
$javaScriptSerializer.RecursionLimit = 99
$javaScriptSerializer.Serialize(@(@{name= "maros"},@{name= "Peter"}))

results in: [{"name":"maros"},{"name":"Peter"}]

Any ideas as to why the Receive-Job Cmdlet causes my output to throw an error when serialized ?

Any help with this would be very much appreciated.

Thanks a lot

Maros

by the way, I am running PS2.0 and can`t upgrade to PS3 or PS4.