NSwag auto generate client: Generates function return object type wrong.

[salahhus]

Hi NSwag team,

Just I'm trying to generate HttpClient generated file by NSwag from my API controller.

I have this marked row in my API controller:

But it generates here wrong return type:

I would expect this:
System.Threading.Tasks.Task<PageData<IEnumerable<ContractDto>>>GetContractAsync();

Please, could you give an advice, how can I solve it?
Thank you