After exploring a world for a bit, I've encountered this crash. It seems to occur near the same location every time. The error that is presented says
Cannot invoke "bzk.a()" because "$$0" is null
 

The world seed used was 5981848540016470553 and the location is somewhere around:

x: 1667 y: 190 z: 35

My crash log has been imported in this report below.