Little Bug when mining on tiles.

After Digging a big hole for sand onto tiles the excavator still digs up rocks after a clean slate.

Oh dang. That was the one thing that I was hoping that tiles would do for the game.

I noticed the same... the materials "blend" even after clean layers. its been reported before (cant seem to find it now tho)

I am sure the dev's will be working on it as well to be able to add it into the blueprints.