*SMH* i honestly suggeted this (CTRTransfeer/Restore old Pre-B9S NAND Backup) in your Last thread OP, and as it seemed not what you wanted to hear you shrugged it off (and for gods sakes dont create more threads for this .. this is yoru 3rd, mods are soon going to get pissed Off and your going to get suspended.
dont really go asking for more help till you tried everything people have suggested. it's Rare but heres food for thought (sorry if this comes across hostile.) but 3DS NANDs do wear out after awhile and it can be random when they give out. if a CTRNANDTransfeer doesnt fix or a A9LH NAND Backup (to repeat the process w/ having backed up your SD, Format it clean and only throwing on it what you need for the Migration process again.) 1: somethings being transfered/installed corrupted (likely you have a failing SD or its a fake.) or your 3DS's NAND has begun to fail.
sorry to be brunt like that But sometimes to get the message across one must needs be such. and if your NAND has begun to fail its a surprise you havent seen anything beforehand till now. i can say i feel for you as my A Link Between Worlds O3DSXL did this right on day 1 i had to restore the NAND backup i made before hand go back to A9LH, backup everything off SD, Format it clean copy back over, and redo the A9LH to B9S Process. i havent seen it encounter any Arm11 crashes by Luma/Home Menu load since.