Not federating with/from lemmy.world? How to report?

I noticed a couple posts from lemmy.world didn't federate here. I looked at a "federation health" interface and it looks like piefed.social is like 8 hours behind lemmy.world:

https://grafana.lem.rocks/d/bdid38k9p0t1cf/federation-health-single-instance-overview?orgId=1&var-instance=piefed.social&var-remote_instance=lemmy.world

I wasn't sure where/how to report this or to check if someone already knew. Thanks for any info! I'm a big piefed.social fan!