As far as I’m aware, these 2 communities should be kept identical by federation. The first link shows 4 posts, but the second link shows 0 posts.
What could be done to fix this?
https://lemmy.ml/c/nissan_leaf
https://aussie.zone/c/[email protected]
Can’t fix it. This is a consequence of federation and everything being hosted on individually owned servers. The instances that get too big like lemmy.ml get hammered with requests and can’t update properly. We just have to wait for a version update or them to upgrade their servers.