This morning it seems the feed indeed managed to get updated, I now have a lot of new stories.
But I don’t think the issue is solved, as the latest new stories don’t appear, even though the feed was successfully fetched since (at this time, 5 stories are up on the RSS feed but not on Newsblur).
However, it appears that the page fetch actually succeeded a few times in the last 12 hours, so maybe that’s what “unstuck” the feed?
Edit (I can’t post more than 3 messages):
It seems the issue could indeed be related to the page fetch: one was just successful, and the feed got refreshed on my side
