[2021] Weird healing object under white house?

So I was in white house and noticed I heard the healing sound so I went to investigate. When I was around the top of the stairs going down to where hunter mask are displayed thats when I saw the green sparkly effect of healing. Stayed that way for about 3 mins then disappeared. IDK what it was and could not get close to it. Just a bug but kinda funny to see what it really was