I’d be a little surprised if it isn’t some bug. We’re listed on Feddit’s Lemmymap, even though feddit.de pre-emptively defederated from us.
Hexbear also wasn’t listed on join-lemmy.org/instances until Nutomic told us that his crawler was hitting a syntax error when trying to parse Hexbear’s version, 0.18.3.hexbear.2 at the time.