Hell, I'll let this be my first comment; it's on a different instance than my account to boot! I'm running into some issues with some of the newer instances not being federated; some of the subreddits I was hoping to replace here are unavailable as a result. Still, I'm happy enough to be a part of something new and different.
If they're new, it might be an issue with the Reddit Hug. From the way I understand it, Kbin has been hit hard by new signups and added extra cloudflair checks to slow everything down in order to keep going while the backend is worked on. That slowness has meant less frequent polling of the fediverse and less caching, so fewer posts are reaching the front page and external instances occasionally don't show up in search (especially if they're new).
Not sure if this is the issue you're seeing on lemmy.dbzer0.com as well, but either way I bet it's just growing pains. How do you like the fediverse so far?
That is indeed the issue over on kbin.social, it's basically isolated at this point. for the time being I made a fedia account since it's the same kbin ui and things seem to be syncing better here?