I was doing some testing and I think I found out a way to fix the save bug when you press home and close and sometimes it freezes the 3ds here's what u do.
Save your game then press home instead of pressing x to close press b cancel 5 times wait and few secs then close. I have done this about 20 times my 3ds never froze once.
Save your game then press home instead of pressing x to close press b cancel 5 times wait and few secs then close. I have done this about 20 times my 3ds never froze once.