Condensing Spell List in Battle

I did some more testing, I was able to do Lete River completely (with spells from Terra showing correctly and using the right MP cost, no problems there), take Sabin' scenario and get Shadow until the game finally freezes during a fight outside. I made a save state just before that fight and it freeze ~75% of the time, and (sometimes) at a random moment during that fight (so random!). Again no other patches used, FF3us v1.1 ROM used and modified by FF3usME with "mst AI" patch applied if that's of any help.

just for knowing it... what if you change the order of sorting spells from config menu?(black-white-grey, white-black-grey, ...)
still compatible with the patch? asking this because sketch bug trigger depended also from the position of a certain spell in the menu

I will test with a different spell order and see how it goes.