i think there might be a few reasons why this is happening.

from what I understand, all federation requests are stored in a queue, and if the server happens to restart with a bunch of stuff in the queue, then those federated comments/posts/whatever are basically lost. pretty sure they’re working on saving the queue so that that doesn’t happen anymore.

there’s also another issue, linked from that issue i posted above, that has to do with HTTP signature expiration times. i’m just guessing what that means, maybe if it takes more than 10 seconds to federate then the content is rejected?

so it looks like they are actively working on some of these issues.