It might not just be lemmy.world, but several times recently I’ve made posts (usually to !helldivers2.lemmy.ca) that I check throughout the day. Then like 8 hours after I’ve made the post, I’ll see comments appear from people on lemmy.world that are several hours old.
It seems like there can be a queue that gets build up and then is suddenly flushed.
I see it happening the other way as well. This morning I made a post from my sh.itjust.works account and then switched over to a lemmy.world account and can’t see it. So the delay is going both ways.
Dbzer0 recently had issues with long federation queues with big instances, due to delays in database access caused by geographic distance between frontend and backend… maybe this might be caused by something similar…?
Interesting. So by having the database and front end servers in different data centers, they couldn’t keep up with all the requests from the big instances. Sounds like upgrading to Lemmy 0.19.3 changed how the federation queues worked, where it wasn’t a problem before. I wonder if something similar could be going on here.