Why is SyndicationFeed or XmlReader not loading the updated feed?

Question

ASP.NET

I am writing a small news aggregator, the news itself is aggregated from RSS.
The following code snippet https://gist.github.com/Enapiuz/9d73899ce739f6bb3416 is a little ugly, but oh well, it's the second week since I'm trying to write something seriously in C#.
What is the problem: I deploy all this in azure, as a continuous webjob, immediately after the deployment everything works as expected, new news is collected, everything is fine. But it seems that the updated feed is not loaded after it is updated at the source (I tried to do Console.WriteLine at the beginning of each cycle - everything is fine, nothing freezes).
By and large, azure has nothing to do with it, there is simply no time to test it normally on the locale.
Is this something tricky to do with SyndicationFeed or have I done something very wrong here in general?