Henchmen weren't in the early access, so they weren't playtested by the beta community.
People aren't perfect, so bugs will occur. Bugs in the game post-launch also need to be reported before the devs can do anything about them. Larian released more patches in a short space of time than I ever saw in a game before. The game is huge, and developed by a small studio. Right now, most of them are having a well-earned holiday.
