For some reason, the update function is only running once. Why does this happen?

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

public class LightFlicker : MonoBehaviour
{
    float timer;
    float timetowait;
    // Use this for initialization
    void Start()
    {
        timer = 0;
        timetowait = Random.Range(0.01f, 0.8f);
    }

    // Update is called once per frame
    void Update()
    {
        Debug.Log("Updating");
        timer += Time.deltaTime;
        if(timer >= timetowait)
        {
        
            if (gameObject.activeInHierarchy == true)
            {
                gameObject.SetActive(false);
            }
            else
            {
               gameObject.SetActive(true);
            }
            timetowait = Random.Range(0.01f, 0.8f);
            timer = 0;
        }
    }
}

The debug.log statement only fires 9 times. Edit: Also, the timetowait changes, but the timer stays the same.

For some reason, the update function is only running once. Why does this happen?

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

public class LightFlicker : MonoBehaviour
{
    float timer;
    float timetowait;
    // Use this for initialization
    void Start()
    {
        timer = 0;
        timetowait = Random.Range(0.01f, 0.8f);
    }

    // Update is called once per frame
    void Update()
    {
        Debug.Log("Updating");
        timer += Time.deltaTime;
        if(timer >= timetowait)
        {
        
            if (gameObject.activeInHierarchy == true)
            {
                gameObject.SetActive(false);
            }
            else
            {
               gameObject.SetActive(true);
            }
            timetowait = Random.Range(0.01f, 0.8f);
            timer = 0;
        }
    }
}

The debug.log statement only fires 9 times. The timetowait changes, but the timer stays the same.