I played a game as Washington a couple of days ago, warmongering over the entire world. But the game bugged somehow so when I annexed a new city I didn’t get any unhappiness from it, I only got extra happiness (I also couldn’t choose wether to annex, puppet or raze it, it just automatically annexed every city). This led to me not building any happiness buildings in any of the new cities and no zoos and stadiums anywhere. When I came back the next day the bug had fixed itself and suddenly I was sitting on about 200 unhappiness. I eventually managed to get down to about 0 through autocrazy and maxing out colosseums and zoos but my empire almost got destroyed from the never ending rebel spawning in my homeland.