What is happening:
Ore vein can spawn under terrain.

What should be happening:
I think it shouldn't be possible.

Steps to reproduce the issue:
Mine at applewood high plateu for elementium crystal.
If you get message: revealed ores and you don't see anything try to use cc and look underground.

Game client version:
Give the name of the archive from which you got this version

Reproduced by:
GreatestTrixie

Reproduced on:
Ubuntu 18.04

Screenshots:

This ore isn't visible from surface