In my current game, on next turn, I'll get broken promise from Aztec regarding converting their cities. I do not have a single religion unit in the game. Could it be because of passive pressure? If so, that is really dumb mechanic, since that is a promise that can not be controlled by player actions at all. And even if so, I have no idea what exactly triggered the broken promise. I've attached the save, please take a look (pass one turn to get message). I know what happened. There was a native Aztec city I got in peace deal from them. Then I gifted it to Spanish. When Spanish did conversion of their own city, it triggered the broken promise. This is a bug. In fact a double bug. 1) No nation should ever complain abut conversion of cities they do not own, even if they were original owner in the past. 2) No nation should complain to another nation about conversion, if conversion was done by 3rd nation, especially if 3rd nation received the city as a gift and owns it. Can moderators move this to bug forum? Anyway, if you even get request to not convert cities, and you know that you never did such thing in your turn, then never agree, since it must be a bug triggered by conversion from 3rd player.