LineRenderer memory leak

I was hunting a memory leak and I've narrowed it down to LineRenderer. Repeatedly creating and destroying one causes my Total Objects in Scene to steadily climb, but with all the other components I checked it would stay steady.

Am I doing something wrong or is this a Unity bug?

 public class MemTest : MonoBehaviour {
     private LineRenderer test;
 
     void Update () {
         if (test == null) {
             test = gameObject.AddComponent<LineRenderer>();
         } else {
             Destroy(test);
             test = null;
         }
     }
 }