Okay, got the save, tried it out and the bot is hostile in our version too. Now, the bot belongs to what we call a neutral faction (to which creatures like cats, dogs, borers, certain npcs and the like belong as well). The thing is, members of this faction aren't supposed to broadcast their hostilities to other members if they get attacked (so attacking some stray cat doesn't make the cat from across the world turn hostile to you). That means there is or are some npcs out there that do broadcast it, and when you attacked it/them all of these neutral creatures turned hostile to you (all latchers are hostile to you in this save, for instance, adn they shouldn't be). With that said, I have a few questions which might help us find the culprit (we'll fix it some other way anyway, but it'd help us to know what's causing this).
Were the latchers hostile to you when you went down to DC (it'd mean the culprit wasn't something you attacked beforehand)? Did you by any chance become friendly with IRIS and then attacked her bots even though they are neutral? Do you have a save before Arke (or even from the start of DC) in which you could visit the bot and check if it's hostile?
Let's start with that. Hopefully it's something DC-related. Thanks in advance.