How does the "natural gallery" lore affect the cave sweeper mechanics? Say I have identified a wall tile as unstable and am mining a safe tile near it; what happens when "Natural Gallery" opens up and crosses the unstable tile? Do I get a free pass or will some other random tile now be unstable?
red circled stockpile = previous location of unstable tile
blue circled me = mined tile
green arrow = direction of natural gallery