Comment synchronization (?) issues

During the last few days I stumbled accross mulitple links to Lemmy subs or specific threads from other Lemmy instances where I was able to read comments although I wasn't logged in, since I don't have an account there. But when I try to lookup the same subs/instances via our beloved instance Geddit, it says that there are no comments, although I'm able to see the initial posting.

Did anyone here experience something similar?