So I finally found some graffiti to use on the portal in my PD and when I entered the portal the game crashed. I did not save after activating the portal. When I reloaded the game, I couldn't use that code anymore. I'm not sure if this is considered "expected behavior" so I thought I'd post about it here just in case. I did do some searching before posting and was having a hard time finding any existing threads about this specific issue. I apologize if I've missed it.