In levels with the glass covering over candies it is not possible to move the candies that are under the glass. The in-game helper suggests making moves that require these unmovable candies to be moved. In some levels there are no possible moves left but because the in-game helper suggests the impossible move the candies do not get reshuffled..The result is that I have to quit the level.
This is a particularly bad problem on level 3563.
I think this is a bug. The game should not suggest moves that are impossible