Just wanted to add to this discussion and how seriously ANNOYING it is with the change to chocolate box rewards! I used to always try to reach the targets before, to get useful boosters but these silly short timed ones are just nonsense!
I have the same problem, all of a sudden the game is fullscreen on my Galaxy S10 - I really don't want it like that, super annoying! Please change it back asap to the way it was Candycrush team!