World changes are stuck the way they are when saving and quitting a world

World changes are stuck the way they are when saving and quitting a world.

Steps to reproduce

1. Start breaking a block and when the block develops cracks in it, while still mining the block (in the middle of mining it), press esc and then save and quit to title
2. Re-log in the world
--> The cracks in the block are staying the same, not resetting