Hi,
I've actually noticed this bug in a few previous versions, but just hadn't found the time to come here and report it.
When this mod is enabled, the computer (90% of the time) will declare war on another player if I offer it to them in the trade screen with nothing in exchange. If I ask them from the discussion screen to declare war, they will refuse. If I offer them a luxury, gold, etc, they will refuse.
Here is an example from a current game: Incans declare war on me. I go to everyone and ask them to declare war on the Incans. Everyone refuses from the Discuss screen. I offer several luxuries, gold, and GPT to all Civs they still refuse. I then offer nothing in exchange for them declaring war, and all Civs except for 1 (Babylon) agree and declare war on the Incans.
Try this in your games and see if you can get it to replicate. It's got to be a bug.