I am noticing that some comments, which are coming from users on other verified (via /instances) federated instances, do not show up on a post. For example: https://programming.dev/post/13648105
Does not show this comment on it: https://lemmy.ml/comment/10803786
Any ideas why? I checked the modlog and the comment wasn’t removed, and their post history to me does not look like someone that is likely to be banned from the instance, so I’m not sure what else it could be.
https://feddit.de/ returns a server error, so it is a problem with the federation - i.e. lemmy.ml was able to pull the comment at some point, but programming.dev could not.
Federation issues like this are common in my experience, but ofc ymmv bc it depends heavily on from where to where. e.g. I am using my discuss.online account rather than my startrek.website one for similar reasons, where the latter server often randomly fails to receive or to post something lately.
How is the index page returning an error indicative of federation problems?