Hi, thanks for a quick reply.
Been troubleshooting and found out the bug was caused by simpletrainer (TrainerV)
I don't really understand why the trainer all of the sudden just broke the AI, but I'm not going to question it and just used a different mod menu.
Merry Christmas to everyone and I hope troubleshooting works for all of you!
Delete the trainer from your files, if you are using simpletrainer (TrainerV), run the game again and see if you get the same bug.
Mine had to do with the mod menu I was using.