I‘m aware of the current federation issues that might also be the reason for this issue but I noticed that while federation of posts from feddit.de works sometimes as well as posts and comments from other instances no comments from feddit.de are syncronised at all.
It might be better to ask there but as I do not have an account there I thougt I first ask here if this is already known. Does somebody else also have this problem?
Hm … okay that would explane why only Feddit.de does have the problem. I guess they have to do something on their end. Quit annoying because of how important they are for German content.