Well, this is strange. I closed the game, reopened, went to check out the building at the left of the Prison and she wasn't there this time. The trigger to the bug must be very specific, because I tried to retrace my steps to see how it got triggered, but she's not appearing in the building to get bailed out. Which is sort of a relief. I guess it's not as urgent as I thought, but please take a look into it @RyenSaotome
Thanks