I'm not sure if this is the particular bug for me or a particular bug for this case or bug of this scroll, but it seems that I can't scribe the scroll to the spellbook anymore after the patch.
My party is in the castle now, and I had a scroll of the fireball in my inventory before the patch. After the patch, my party just reached level 5, so I leveled up, and I tried to scribe the fireball spell to the spellbook.
But when I right-click the scroll, and press scribe, and then press the spellbook, nothing happens. A spellbook has enough empty space but no change so far.
It is a bit strange because I was able to scribe spells from scroll to spellbook. I guess I need to test with other level 5 scrolls later.
PS) I quit the game, reboot the PC, load the save file, and tried again. Then it worked. But still, I'm not sure why such bug happened...