Please note that we've updated the Mount & Blade II: Bannerlord save file system which requires you to take certain steps in order for your save files to be compatible with e1.7.1 and any later updates. You can find the instructions here.
from 1.6.3 beta,, no charm XP and relation gain when donating prisoners (lord and merc) to a town. Noted that the charm skill has not reached hard cap yet.
How to Reproduce: compare xp charm in character level before and after donating the prisoners. Also no relation gain notification...