Why does ConvertTo-Json drop values - powershell

Question

I am using powershell to explore a REST API. I discovered a strange anomaly. When I serialize/descrialize the following objct, the responses object are gone! I have verified that it is all still in tact when converted to .net object, so the problem happens when converting from .net object to JSON.
$json = #'
{
"stubs": [
{
"responses": [
{
"is": {
"body": "54"
}
},
{
"is": {
"body": "21"
}
},
{
"is": {
"body": "0"
}
}
]
}
]
}
'#
$json | ConvertFrom-Json | ConvertTo-Json
The result form the above conversion is this:
{
"stubs": [
{
"responses": " "
}
]
}
If I run this, I receive 54, as expected:
$json | ConvertFrom-Json | %{ $_.stubs.responses[0].is.body }
I am running on Ubuntu, but don't believe that should make a difference. This should be easy to verify for someone on Windows.

Answer 1

ConvertTo-Json takes an optional Depth parameter that (for whatever reason) defaults to 2. The parameter itself is described in the linked docs as follows:
Specifies how many levels of contained objects are included in the JSON representation. The default value is 2.
If you provide a higher value for this parameter, it’ll work - The maximum value is 100:
$json | ConvertFrom-Json | ConvertTo-Json -Depth 100