Thanks @SuperrSonicDone. A log of Fire Emblem after a crash. It actually doesn't matter the spot, in my tests any chapter load may freeze all the same. This one was done on chapter 2 for example.
I managed to finish the game but would love to get it fixed if possible.
Now it's up to @FIX94 and MAYBE @GreyWolf (since he asked for the debug log) to see if it's possible to do something about it.