That's distressing to hear. I'm not seeing a reported exception that looks like what you describe, unfortunately. Would you mind sending me the troublesome save file in question? You'll find it in the "saves" folder where Bronze Age is installed.
It seems itch.io doesn't have a private message option, and I'm hesitant to publicly post my email, but if you have a reddit account you can PM me /u/CommodoreShawn I can give it to you there.