Unable to deserialize ChangeNotificationCollection using System.Text.Json

[simontfoil]

Describe the bug

I have a subscription set on a shared mailbox and I am using the Graph to trigger an Azure Function on the arrival of a new message. This is all working really well except I can't deserialize the notification payload using System.Text.Json. Newtonsoft works fine.
At first the Value property is always null. If I set PropertyNameCaseInsensitive to true I get an error "The JSON value could not be converted to System.Nullable`1[Microsoft.Graph.Models.ChangeType]"

It seems there is no easy way to use System.Text.Json

Expected behavior

Successful deserialization of ChangeNotificationCollection using System.Text.Json

How to reproduce

The following fails using System.Text.Json

string? payloadJson = await new StreamReader( req.Body ).ReadToEndAsync();
JsonSerializerOptions serializerSetting = new JsonSerializerOptions()
{
           PropertyNameCaseInsensitive = true
};

ChangeNotificationCollection payload = JsonSerializer.Deserialize<ChangeNotificationCollection>( payloadJson, serializerSetting );

SDK Version

5.98

Latest version known to work for scenario above?

No response

Known Workarounds

Use Newtonsoft.Json

Debug output

Click to expand log

<Log output here>

Configuration

No response

Other information

No response

[MartinM85]

Have you tried to use KiotaJsonSerializer?

var notifications = KiotaJsonSerializer.Deserialize<ChangeNotificationCollection>(bodyStream);

[lramosvea]

Thanks for raising this @simontfoil! Please try using the KiotaJsonSerializer and let us know if that works for you.

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