Active dig orders in caverns layers - at least on layer 2/blue - crashes game after a minute or so once dig orders become active. Happens on both multithreading enabled/disabled, leaving the dig orders as blueprints seemingly prevents the issue. Dig orders on other layers appear to not cause crashes. Pathfinding proccessing issue across many z-lvs maybe? Or something else?

I left the save off at the level I was testing on but with the dig orders as blueprints. Convert them to regular dig orders and see if it crashes on your end or if it's just me.