Resources converted to dirt being transported by conveyer while blocked by same substance forms a building bypassing wall upward. All gas or liquid filled tiles will be converted to dirt as the wall forms upwards, if a building is in the way It will skip that tile and keep going up. It can skip even 3 blocks thick walls to continue on its way above them. It can also eat people.
Steps to Reproduce
Create a conveyor transporting slime into a tile that is already blocked by dirt that formed due to overheating the slime. If the dirt is sufficient temperature to turn the slime into more dirt on that exact tile it may form a tower of tile bypassing dirt wall on its way up toward space.
This issue has not been confirmed by a developer yet.