Click Event Implementation Problem

I have this Clicked behaviour attached to a camera:

 public class Clicked : MonoBehaviour {    
     
     //stores the object that received MouseDown for consumption by the iterator
     private RaycastHit originalHit;
     
     void Update () {
         if (!Input.GetMouseButtonDown(0)){
             //mouse not being clicked
             return;
         }
 
         var camera = Camera.main;
         
         if (!Physics.Raycast(camera.ScreenPointToRay(Input.mousePosition), out originalHit, 100)){
             print ("no object being clicked by mouse");
             return;
         }
         
         var eventsBehaviour = originalHit.transform.GetComponent<SubscribedEvents>();
         if(eventsBehaviour == null 
             || !(eventsBehaviour is ISubscribeClicked)){
             print ("no event subscriptions or does not subscribe to Clicked event");
             return;
         }
         
         StartCoroutine(WaitOnUp(originalHit));
     }
     
     //waits on the mouse to be released on this object so that it only acts
     //upon a mouse click that was completely on this object
     IEnumerator WaitOnUp(RaycastHit hit){
         while (!Input.GetMouseButtonUp(0)){
             yield return 0;
         }
         if(!Physics.Raycast(camera.ScreenPointToRay(Input.mousePosition), out hit, 100)){
             print ("MouseUp not on an object");
         }
         else if(hit.GetHashCode () != originalHit.GetHashCode ()){
             print("MouseUp on a different object");
         }
         else{
             //object received MouseDown and then MouseUp, so fire its OnClicked event
             print ("MouseUp on original object");
             (originalHit.transform.GetComponent<SubscribedEvents>() as ISubscribeClicked).OnClicked();
         }
     }
 }

   

However, if I quickly move the mouse to a different object after ensuring that MouseUp has occurred on the original object, I will see "MouseUp on a different object". Due to seeing this, it seems like calling

 yield return 0

causes the program to not re-enter into the iterator every frame, as in it just skips some frames before re-entering. Is that true?