See also
and
https://bbs.boingboing.net/t/homepage-updating-rather-slowing/176884/3?u=d_r
(and subsequent posts),
Unfortunately, @orenwolf’s response makes it sound like the problem will remain:
https://bbs.boingboing.net/t/homepage-updating-rather-slowing/176884/4?u=d_r
ETA: I am over the moon to see that this was pessimistic, and that the glitch is now fixed.