Wagon changes randomly

I love this game- and am absurdly addicted, so I play every day. And I would give it a higher rating, but lately when I start a wagon quest, and get 3 of the 9 items filled- 5 minutes later when I go to fill the 4th item the wagon has completely reset!!!!! So frustrating when you want to win the specific items in specific wagons.

Squidney1992 about Smurfs and the Magical Meadow, v1.9.1