Feed not loading most recent stories

Since the recent update, when I click on the feed for xkcd (with an unread item) via a web browser, it starts loading through all the items going back to 2015. After a while, the xkcd feed becomes deselected and it instead starts loading the next feed down that has an unread item (or loops back to the top if there is none lower down). This doesn’t appear to be an issue when I use the iOS app; presumably because i have stories displayed reverse-chronologically there?

For reference, I’m using Firefox 102.0 on Windows 8.1

Yeah, I would probably switch to either Newest First or Unread Only (or both!).

Is there a per-feed setting for this on the website?

I can easily find a setting for this on the app but on web I can only find a universal setting in preferences->feeds.