When I click the button to execute the saved battle commands after the NG+ to get into Chapter 5, the cart immediately crashes and the 3DS shuts down.

It didn't start happening to me until I got a 3DS XL, so perhaps that might be part of it. But I wanted to call it out in case others might run into it! :) Inputting the commands manually and then saving them fresh to the pre-sets works just fine going forward from here.

PS hi I'm still kicking around! Hoping to be able to record a run of this, I'm hovering around 3:45:00 and I know for sure I can cut that down :D