Minecraft will crash on switch for random reasons. If you wait too long on title screen, it will keep the loading bar on screen making u close the software and then it will say the software closed due to a error happening. Sometimes when you load into a world, it will freeze, then closing software saying software closed due to a error happening. Then sometimes when you are in your world, it will just close the software saying software closed due to a error happening and when u load back in, u will lose some things.