Harry Potter Lego.

Good day. I play on ps4. There is a problem with Harry Potter Lego. I can't figure out what's wrong. When you pass the task - you need to break objects with dark magic. before the task, you drink a potion, turn into a task, and .... the effect of the revolving potion disappears. The game can't be completed completely because of this. How
to fix this, tell me. Disc game.