I tried to unlock several friendly achievements today (Shin Hisako and Kilgore) but none are popping. I’ve been unlocking other achievements fine and did not experience any problems with this achievement from other characters until the last updates.
Actually, I’m not the only one. This discussion can be viewed on [https://www.trueachievements.com/forum/viewthread.aspx?tid=949900&anchor=7459970#m7459970].