Haven't even noticed this feature is supposed to exist
Don't honestly think it is a good feature. It lends itself for abusive behaviour towards the AI. It requires a lot of AI scripting to prevent abuse of the mechanic and even then, it will become quite apparent that the AI is not actually playing the game.
e.g.: Siphoning tech from friendly empires or gaining advantage before an invasion
Galciv has put so much effort into this part , they had huge experience wit past games and still the AI lets itself being played like a violin.
Would much rather see the AI take a base competitive stance towards all others and play its own game
Would also spare the player the not so fun mechanic of "farming" the diplomacy screen in regular intervals