It is caused by the Gauva file i dont know if i spelled it right, But this file when corrupted tends to love to crash the game you should try to move everything important into back up then delete .minecraft otherwise known as "clearing" your game.
All versions have this bug it might just be implemented since lava and water dont count as regular blocks in the game the grass thinks its air and stays fine without a touch.
It is caused by the Gauva file i dont know if i spelled it right, But this file when corrupted tends to love to crash the game you should try to move everything important into back up then delete .minecraft otherwise known as "clearing" your game.