Transform component error

[Mikoteko]

When I want to get the length of an array in the Transform Component :

http-datasource {
    body-length : ={$.http-datasource.body}.length
}
http-api {
    body-length : ={$.http-api.body}.length
}

It works with the Transformer version 1 (V1), we can get the 2 lengths. (Even when typing $.http-datasource.body.length)
But with the second version of the Transformer (V2), we can only get the second length in the http-api object.
No typo error has been made.

Link