Why only the first frame of the animation is playing

Questions & Answers
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1

When I start the game and trigger the animation, it plays only the first frame and ends soon. When I look at it in the Animator window during the game, I see only 15% of that animation playing and stopping shortly after.

I already have unchecked “Can Transition To Self” and “Has Exit Time”.

Thanks in advance.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class PlayerLife : MonoBehaviour
{
    private Rigidbody2D rb;
    private Animator anim;
    // Start is called before the first frame update
    private void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        anim = GetComponent<Animator>();
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.CompareTag("Trap"))
        {
            Lose();
        }
    }

    private void Lose() 
    {
        rb.bodyType = RigidbodyType2D.Static;
        anim.SetTrigger("lose");
    }

    private void RestartLevel()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().name);
    }
}