When you eat cake, but not all, and reenter this world, cake will be full like just placed.
Immortal cake: slices reappearing.
Wooden doors open on world load
Partly-eaten cakes become whole when exiting and re-entering game
Wheat, Cactus, Sugarcane, and Melon: growth regression on close
Some gates/doors/traps aren't saving their 'closed' status