[Q]

These are all valid explanations but I saw the AI break treaties where I could rule out all these possibilities. More than that two turn later the same AI proposed a new treaty to me! I can exclude intel because I had tons of counter intel points available. It may be a random event but it happended "clustered" with several AI doing this within a year or so. May be after a certain time the AI get's tired of the treaty as it was coded somewhere by MM???