Hi @Verdis did you read my message above to you saying that it would happen if you uninstalled the game? I wish that didn't happen and I wish that we could sync all lives and boosters across everything but it can't be done. The box of chocolate is a new event. You can clear up to 3 chocolates per day but they have to be different colors and then you get the rewards.
I just got the box of chocolate yesterday but I'm not impressed with it It's sad about losing the boosters on a device. In the past so many players came here asking why they lost everything when uninstalling and reinstalling the game. I used to have it as part of my signature but I don't think people read my signature because they were still surprised to find this out. Maybe it has something to do with Apple and Android and nothing to do with King. I know that the levels are always behind on mobile because Apple and Android have to approve them before they are released.
Are you getting the sugar drop challenge? You can accumulate boosters that way too. Let me know if you have no clue what the sugar drop challenge is and I can explain with pictures.