Subscriber count on federated magazines not accuretely shown

While reading this article https://kbin.social/m/france@lemmy.world/t/97300/Consulation-sur-la-direction-de-cette-communaute I observed OP said something about the community being over 1000 members, yet in the sidebar it was showing to me (in kBin) there were only 92. I double checked by going to lemmy.world and those 92 were ONLINE subscribers.

Has anyone else encountered this bug?