There are ongoing issues between incoming and outgoing activities between Ani.Social and Lemmy.World. Posts, comments, and votes from both instances are not in sync with each other.
The exact cause is to be determined. The instance may experience downtime and interruptions until further notice.
In the meantime, we suggest using an account on an instance that is federated with both Ani.Social and Lemmy.World.
Thanks to @wjs018 for informing me about this issue. Thanks also to MrKaplan from the Lemmy.World team for continuously helping us resolve this issue.
The latency limit is caused by the activity queue that was introduced in v19.
Servers can only talk as fast as round time allows, because Lemmy instances now keep track that each event actually does get federated, and in the right order.
That last point means each event only gets sent once acknowledgement of the last one is received, creating a hard limit for how many events can be communicated, depending on ping. A mere two per second with a latency of 500ms.
This serial process will obviously need to be parallelized. But that’s difficult.