[2D] [C#] Sprite disappears after changing position

I've run into a problem that's been bothering me a little bit. I'm sure the cause of it is something very simple, but I can't seem to think of anything.

My scene currently has a set of spikes and a player. Whenever the player collides with the spikes, it's supposed to respawn at a checkpoint. I've used the following scripts for this:

KillPlayer (attached to Spikes)

 public LevelManager levelManager;
 
     void Start () 
     {
         levelManager = FindObjectOfType<LevelManager>();
     }
 
     void OnTriggerEnter2D(Collider2D other)
     {
         if (other.name == "player")
         {
             levelManager.RespawnPlayer();
         }
     }

LevelManager (attached to empty gameobject in scene)

  public GameObject currentCheckpoint;
     private PlayerController player;
 
     void Start () 
     {
         player = FindObjectOfType<PlayerController>();
     }
 
     public void RespawnPlayer()
     {
         Debug.Log("Player respawned.");
         player.transform.position = currentCheckpoint.transform.position;
     }

I know this script works, because when I move the player into the spikes, the camera moves back to the position of the checkpoint. However, after this happens, I can't see my player anymore.

After some research I found that the problem might have something to do with the Sprite Renderer's Sorting Layer being set on default, but I'm too much of a newbie to know what I'm supposed to change to fix this.

To be sure, here's a few screenshots.