I just noticed that when clicking on a series from the main series page, the individual series page loads with the page scrolled some or all of the way down. With series that don’t have many seasons this results in only seeing the background fan art image. At first I thought the page wasn’t loading, but I eventually realized I needed to scroll up to see the content.
What appears to be happening is that the scroll position on the series list page caries over to the individual series page. So, if I’ve scrolled down a ways on the main page, when I click on an individual series the page will load scrolled down to the same location.
This is in Chrome using the latest develop release of Sonarr.