IIS ReasonPhrase "Site Disabled" not populated on iOS

[otebos]

Hi,
So I'm calling API that is hosted on Azure.
When my site is down, Azure returns 403 with ReasonPhrase "Site Disabled".
This works for Android but for iOS I have ReasonPhrase "Forbidden" which is generic and doesn't allow me to react properly in the app.
This also works on iOS if I use .NET HttpClient instead of ModernHttpClient.

I suspect that this is NSURLSession issue, not ModerHttpClient`s.
Do you know any workaround for this issue?

Do you know if I can get raw (xml) servers response to see what's there and manually handle such situation?

Thanks,
B.