Noticed this several days ago. I wanted to be active in this community: https://lemm.ee/c/tf2@lemmy.ml
However, as you can see by comparing to lemmy.ml’s own version of the community, lemm.ee is not properly updating comments or point totals: https://lemmy.ml/c/tf2
When I left my own comment on a post there, it did federate to other instances, but it’s not being updated on lemm.ee.
I’ve noticed something similar with other lemmy.ml communities, large and small. Compare:
https://lemm.ee/c/steam@lemmy.ml and https://lemmy.ml/c/steam/
Politics as well:
https://lemm.ee/c/politics@lemmy.ml and https://lemmy.ml/c/politics
And probably others as well. I’ve checked to make sure my language isn’t set to undetermined and I’ve also tried viewing the communities while logged out.
There’s also something bugged about trying to subscribe to any of lemmy.ml’s communities. They appear on my profile and feed as a sub, but visiting the communities themselves, I’ve been stuck on “subscribe pending” for several days. Clicking the button repeatedly to make another attempt to subscribe doesn’t work. Not a huge deal since they still show up in my feed, but it might be related.
Basically, when you make a post or a comment on lemmy.ml, then at the same time, that post or comment gets pushed out by lemmy.ml to the federated network.
If lemmy.ml fails to send it out to the network, OR if any instance fails to receive this message (currently both are likely due to massive load increases), then the message will not be visible on that instance.
Other instances can then still pull that comment from lemmy.ml, but this is a manual action triggered when a user of that instance somehow interacts with that specific post or comment (currently this means searching for it). Of course, this pull can again fail if lemmy.ml is still overloaded! For example, when searching for your comment, the sync seems to fail every time…