Why does GetFieldDeserializers-Method not get called?

[bouldrini]

Hello Kiota Community,

I try to understand deserializing mechanisms in kiota.
I have generated a C# Client for an API and successfully integrated it in my application.
I successfully called several interfaces in the API using the client.
I can see the server responses nicely packaged in the classes that were generated by kiota.

But here i am facing a problem:
The method "GetFieldDeserializers" should be called for every object that is instantiated while deserializing the response from the server to define how the fields in the response are processed further.
But for some reason the "GetFieldDeserializers"-method is not called for objects of some classes - leading to objects that do not have accessible data!

My question is:
What indicates if the GetFieldDeserializers-Method is called for an object or not called for an object?