When placing furnaces with World:SetBlock they become invisible

[MGlolenstine]

When I use SetBlock with furnaces, the furnaces become invisible and to destroy them, you have to place block in the same spot and then break it.

Code:

World:SetBlock(v.cleanpos.x, v.cleanpos.y, v.cleanpos.z, E_BLOCK_FURNACE, 0, true)

The block should be synced with the player, as the last argument is set to true.