@Heibergtook my latest clumsy workaround and narrowed-down/refined it, to realize that: ransoming multiple Raiders at once seems to cause the Prisoner-Done-Button bug. I had started narrowing my own list down to Raiders and Marauders, but at the very least Raiders are confirmed at this point.
Hi, this issue is fixed with the new patches. Please update me if you encounter any issues with it again. You can review the patch notes via the link below.