Broken promise to not convert cities

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.

 

I got something similar, but not quite. I used an apostle to convert an enemy city and got the "stop converting" demand, which I agreed to. Several turns later all was well and good, but I decided to reload the autosave for the previous turn. On loading I got "you have broken your promise".

I tried reloading save after save, no matter how far back I went I got the same broken promise message.

I haven't tried reloading the save prior to the conversion yet.

There is most definitely a bug with conversion promises somewhere.

Edit: Oh, and my version no is 1.0.0.26

Funny enough I also play as Trajan.

 

Another twist on the "do not convert" bug:

If you fight a religious battle [even in your own territory] and kill a religious unit from another civilization, this will cause a spread of your religion within a radius of the site. This can cause third-party cities to convert to your religion, which will trigger the "do not send missionaries into our land" request (which is a design flaw in itself, since no missionary was send into their lands). If you then promise to not send more religious units to convert their cities (to maintain good relationships) and another AI keeps sending their religious units into your land which you then have to battle, causing more spread, this will count as a broken promise to the civ who's city got converted. This (obviously) relates to version 1.0.0.26 of the game.

 

They probably can, if you contact one.