We seem to be having trouble with a handful of the larger lemmy instances, as well as some misc other instances even though these instances aren’t dead-dead: https://fedia.io/federation (at bottom of page - “Dead Instances”).
I thought maybe it would’ve been a problem with a specific lemmy version, but there are several versions in the list and also some still-living Mastodon instances that are running reasonably up-to-date versions.
Seeing this from SJW.
The ones you list in the title are all running 0.19.7
Ahhh, I hadn’t considered that they might’ve upgraded since the last time Fedia pulled the versions (making the reported versions outdated, at least for lemmy), good catch!