In Season 9, Chapter III of the Season Journey held some surprises. In past Seasons it was possible for players to earn an objective by completing five Bounties, in all five Acts, during one game.
I always complete the Bounties in all five Acts at the beginning of each Season. To me, it was something fun to do while leveling up a new character. It also was something a low level character could do that would earn one of the many Season Journey objectives.
To my surprise, Season 9 changed the one objective into five separate ones, giving each Act its own objective. I discovered this while I was still trying to complete Chapter I.