Not sure if this is a bug (or perhaps you just know more than me), but although UIScrollBar subscribes to some UIEventListener events in Start(), it doesn't seem to unsubscribe in OnDestroy. I've been trained (by Prime31's plugins) to always balance subscribe/unsubscribe to events to avoid leaking objects between scenes, so I wanted to bring this up and ask if this is omitted intentionally, or is it a bug?