Haunted music box

This is a vintage Anri carved Thoren Swiss movement music box that plays“True Love”. It was manufactured between the 1940s-60s in Switzerland. It has a stopper to pause the music. This particular piece belonged to my late grandmother. She told tales of an old woman she’d see walk through her kitchen, then this would start playing in another room. We keep it in our china cabinet, and it will begin to play on its own randomly. The music is very light and beautiful and turns off when you put the stopper on. But something (or someone) keeps turning the stopper off. Everything functions properly aside from whatever likes to make the music play on its own. The little girl dances in a circle to the music.