I see, looking at the code now, I see what the bug is. Sorry about that, will have that fixed for the next update!
No worries! I still was able to unlock them through events! Love the game by the way! I always come back and check what's new every 6 months or so. This is my 3rd playthrough. Great art, great writing, but what really keeps me coming back is the voice acting and sound design. Nobody else compares imo. Great work to your whole team!