the problem occurs with every article and exists ever since I use the app on several iPhones and iPads.
Here is a specific example: The most recent article in http://rss.kicker.de/team/bayernmuenchen has the following title:
I can see the article in the list view for the feed. When I click on the article, I see the preview with the beginning of the article text. When I then press the button "Quelle" (which is German for "Source") in the upper right corner nothing happens (except a spinning wheel in the iPhone status bar) - the full article page is not being displayed.
The only workaround that I know of is to use the menu on the lower right corner and then select to open the article in the Safari or Chrome browser. As mentioned before, this happens to all articles in both of the feeds I mentionend.