In a save file where my thermal power generator created a large number of 25T piles of igneous rock which eventually entombed in solidified igneous rock, upon loading a pillar of igneous rock was created piercing/phasing through obsidian, abyssallite and my cooling reservoir. The save did not have this precondition on the previous version so I cannot confirm if this is patch specific.
Create a large pile of multiple 25T piles solid material and entomb it in a solid block, save and reload. Liquid in the screenshots is irrelevant, as is temperature. Save files have been primed to show the spike upon load (spike forms after a brief delay, after loading but before time passes).