async/await unstable

Hi!

I'm using async/await and the HttpClient-library.

var content = await client.GetStringAsync(relativeUrl);

However I find the line above to be very unstable. It can work fine for weeks on end but then all of a sudden it hangs/never returns and the task is cancelled. There is nothing wrong with the server, other clients work just fine.

Is there any known issues using async/await and the HttpClient in xamarin for android?

Thanks

Johan