Float randomly being set to 0 spontaneously

In the script we have a float, distanceLimit. It is defined in the inspector and is never changed in any script. However when debugging, it will spontaneously change to 0 for seemingly no reason. I have never seen anything like this and couldn't find any other similar problems. Any help would be appreciated.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.AI;
 
     public class ememyAI : MonoBehaviour
 {
     public float distanceLimit;
     public int time;

     public NavMeshAgent enemy;
     [HideInInspector]
     public Transform PlayerTransform;
     public GameObject bullet;
     public GameObject BobAni;

     // Start is called before the first frame update
     void Start()
     {
         PlayerTransform = GameObject.Find("XR Rig").GetComponent<Transform>();
         enemy.destination = PlayerTransform.position;
     }
 
     public void Shoot()
     {
         enemy.isStopped = true;
         if (time > 60)
         {
             GameObject Bul = Instantiate(bullet, transform.position, Quaternion.identity);
             time = 0;
             BobAni.SendMessage("ShootCheck");
         }
     }

     // Update is called once per frame
     void Update()
     {
         time++;
         float Distance = Vector3.Distance(PlayerTransform.position, enemy.gameObject.transform.position);
         if (Distance < distanceLimit)
         {
             RaycastHit hit;
             // Does the ray intersect any objects excluding the player layer
             if (Physics.Raycast(transform.position, (PlayerTransform.position - transform.position).normalized, out hit, Mathf.Infinity))
             {
                 if (hit.collider.gameObject.name == "XR Rig")
                 {
                     Debug.DrawRay(transform.position, (PlayerTransform.position - transform.position).normalized * hit.distance, Color.green);
                     Debug.Log("Did Hit");
                     Shoot();
                 }
                 else
                 {
                     Debug.DrawRay(transform.position, (PlayerTransform.position - transform.position).normalized * 1000, Color.red);
                     Debug.Log("Did not Hit");
                 }
             }
             else
             {
                 Debug.DrawRay(transform.position, (PlayerTransform.position - transform.position).normalized * 1000, Color.yellow);
                 Debug.Log("Did not Hit");
             }
 
         }
         else
         {
             enemy.isStopped = false;
         }
     }
 }

After running the program for some time, distanceLimit randomly is set to 0. Yet this is only true for when it is called inside of this function. When distanceLimit is referenced in another script at the same time, the distance limit is defined as the value we set.