Quoted from Oneangrymo:
I dont think so, thanks for the advice, but everything was perfectly fine until right now And after ball search mode, the magnet finally releases the ball.
Look at the magnet lug, I expect you will find that ball drops have pounded down one side to make a "shelf" that the ball sits on. The vibration of ball search probably shook it loose.
Common problem I have had many times.
You have two options to fix it:
1. Remove the magnet lug and grind it down with something to make it flat again
2. Replace the magnet lug.
I opted for #2 and bought several to keep on hand. It's a wear item on Wonka.