"Declare War On" Diplomacy Option broken

[Wingflier]

As the title says, in the current patch, the player can not diplomatically convince factions to Declare War on one another, even if they agree to do it and the "trade" completes.

I've experienced this in several games now, so I know it's not an isolated issue.

Here is a save file of my current game. The Drox High Command has asked me to start a war between The Hive and another faction, "Res".

The Hive's view of this faction is low enough that I can convince them to Declare War on them without any further compensation, but even though the trade goes through, nothing happens. Thus, I am unable to complete my objective and cannot finish the game. This is a rather large and game-breaking glitch, which is why I'm pushing so hard to have it fixed.

[Sent Ernit]

Had similar experience, tried to make someone declare war, relation was 10ish. The problem was the race was in the Federation, and other members had good standing with race I needed to make war with, they didn't allow to initiate war. Bug is - you get trading standing for successful trade, and can do it again and again, coz war doesn't start.