First specifically reported a little over a week ago, more and more reports have been showing up concerning the issue.
The admins are well aware of this, and it’s being worked on as Lemmy continues to undergo development, so hopefully we’ll see this mitigated further with each update, and find ourselves with a better synced federated community.
For the time being, just be aware that your posts to linked/remote instances from Lemmy.world may not be getting through to others, so don’t feel too bummed if you think people are ignoring your posts or comments…Chances are they aren’t, they may just not be seeing them!
As to what you may do to work around this, you may want to make accounts in less bogged down instances so that you can more reliably post across instances, but if you’re content with the local communities of lemmy.world, then you may post & chat here till the issues are minimized.