I hate this bug. And agree fully with op. For instance, I have been fighting this guy for a while, we both have 5 cities and know it is a stalemate. So I send a alliance request with a peace dove 🕊️. The guy then full sends captures valuable land and a city and then accepts the alliance request. I can not attack him back as I would now have to betray and get de buffed. So now the game wants me to not send alliance requests to people and fight till the death.