are there federation issues with lemmy.world?

i've noticed lately that there seems to be federation issues with lemmy.world. i don't receive updates from communities or users there, and looking at my profile from lemmy.world, it's missing a few comments that were posted in the last days, when usually it's much much quicker to update.

even when looking at .world communities on here when not logged in, they seem to be stuck in the past! for example, from here the last post from !games@lemmy.world is from 5 days ago, but on .world there are many more recent posts.

does anyone else have issues with them? are we blocking them, or are they blocking us?