Observations Regarding Federation Between Artemis.camp and lemmy.world

I am confused about federation between Lemmy.World and Artemis.camp.

I have noticed that some votes, comments, and posts made by accounts from users at lemmy.world do not show up when viewed on artemis.camp. The same page viewed on kbin.social shows a lot more activity, and it appears most the activity not federating is from lemmy.world.

Artemis.camp and kbin.social seem to federate

Kbin.social and Lemmy.world seem to federate

Artemis.camp and Lemmy.world seem to have trouble federating.

Is there a way to resolve this and get artemis.camp to federate the data?

Thanks!