Not all positions inherit instanceId.

[Stian Andreassen]

Example of bad repositioning:

position = Position(pos.x, pos.y+1, pos.z) # This skips the instanceId.

Correct way to do all repositionings are: position = pos.copy() position.y += 1

Position with same x,y,z, and different instance won't even compare. etc pos == position will fail,

use: pos.x == 1234 and pos.y == 1000 and pos.z == 7 if you don't care for instanceId.

It's done a few places badly. Should be fixed.