velks pathing bug
 

https://www.youtube.com/watch?v=Bq8xy2xEz_g&

could use some node love I think?

Why don't you try with many more mobs than just a single one and see if they all behave like that and not a one time strange occurance?

This is called a happy spot. Generally considered classic until proven otherwise.

Its repeatable, /shrug. Can do it with 5 or 1.