[tor-relays] unlisted exit relay

While visiting https://torstatus.blutmagie.de/ in Tor Browser, I noticed it wasn't detecting the exit node I was being routed through as a relay. Curious, I tried looking up the same IP in both Atlas and Globe, but neither knows of a relay at this IP. The IP of this exit is 104.156.228.115.

What scenarios might cause this situation? As a Tor user, should I care? At the very least, it seems desirable to always be able to research the nodes you are using.