Thanks for the screenshot, I was actually able to pinpoint the issue and fix it. It has a very low chance of happening when you have a certain sequence of events during the rescue mission. So, as it is right now, you might need to redo the rescue mission to avoid it, sorry for the trouble. I'll release the fix with the next update since there is a small one that will come sooner than usual (about next month). Thanks you for telling me about it!