I open a single feed view by clicking its name. I right-click Insta-fetch stories (because I noticed elsewhere that it got updated but newsblur didn’t update the feed yet; might be my “lucky” timing or another issue?). Feed updates, showing [1] (unread number) in the feed list, but the feed view itself doesn’t refresh, you need to click elsewhere and back (or to river of news; feed frame refresh might work too, I don’t know) to see the new item there.
I am sorry about not being more specific - it’s hard to test this for me, but this happened to me twice in the last day so I thought I should mention it.