This is the so called "overreactive physics bug" . I marked on the grid 3 blocks: green, red and black. I was cutting small pieces of about 20 blocks starting with the green block and going toward the red one on the right. After removing the red and black blocks, the short segment was jumping a lot, and went over the sea. The physics is not deterministic, so the exact same segments will not have the same behavior after load. However, there is a very high probability to observe the effect…