Most of the tasks in the Reaper's Rewards event are not being marked as completed in my game. I have planted so many tulips and snapdragons, in planter boxes, on the ground under cover and not and the tasks are not being marked completed. Also, I do not know if this is how the event is supposed to work, but the entire list of tasks resets every time I launch my game. If I complete some of the tasks (buy seed packets, ask about Ambrosia, etc.) they get marked completed, but if I save, exit, then relaunch, I get have to do those tasks again.
I think that worked for the bug where the event restarted each time I launched the game. But it has not fixed the problem where planting snapdragons and lilies completes the tasks.
