World error?

[That_Introvert]

I was mining and notice i was lagging a lot in one particular area.  I proceed mining bearing through the lag and come across what i believe to be the problem.



here's one where i got a bit closer and lit the area up



they dont attack, they dont despawn and they cant be killed

[Nicknclank]

There are probably all going on a very long pilgrimage since all of them are walking in the same direction. That or they know where Froob's house is and walking towards it.

[Jsmariaa]

strange...