Why does an existed ward make a dropping sound when you sweep/get vision of it?

So lately I have realized when I reveal wards with raptorbuff/sweeper/pink ward or gaining vision of a pink ward, it makes a super awkward ward dropping sound. This is actually very unhealthy gmeplay wise because most players have reaction memory and when a ward dropping sound is made the first reaction is "someone just dropped that ward! danger!" but in fact it was jut a exited ward.

This ward dropping sound is.not necessary for the game, pls just remove it. It spookes people.