Scene is not loading

When I press play and go to the first door, it works fine. But when I go to the second door, the scene switches but it jitters and in the hierarchy it says scene not loading. How can I fix this?

Here is script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class KillPlayer2 : MonoBehaviour
{
    public int Respawn;
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    void OnTriggerEnter2D(Collider2D other) {

        if (other.CompareTag("Player"))
        {
            SceneManager.LoadScene(Respawn);
        } }
}

Got it. I spawned the character too close to the door back so it glitched forward and back.