I'm seeing the same. Disappointing since I just signed up for Realms
Playing 15w45a
Just happened to me while bringing a donkey home through the desert. The chunks will load if I get off the donkey, or exit and reopen the world, though that dismounts me for some reason. Pressing F3+A doesn't load new chinks while riding
Realized graphics were set to fast, so ignore the item entity part above. Still applies for thrown potions. Not sure if Fast item entities are supposed to be the same as Fancy ones, except without rotation, but that was what I described above
If anyone cares, there's this issue:
[com.apple.mDNSResponder.AllINFO] AppnedNewSearchDomain: No more search domains for question with name Error.ca.comcast.net. (Addr), not trying anymore
2017-07-05 18:51:39.396123-0700 localhost mDNSResponder[92]:
The application is incorrectly trying to resolve the domain name "Error". (mDNSResponder appends the ".ca.comcast.net" domain in its attempt to resolve)