Issue displaying text on screen

I have 2 characters in my scene, each using the same script. I would like each one to have their own dialogue which I specify in the inspector. I would like each character to display that text when I get close enough to them. This works fine in the console when I use Debug.Log, the console prints the correct message when I'm close enough to the characters.

The problem is, it is only displaying the message on screen for one character but not the other, like so:

As you can see, when I get close to the red character, the text and his camera close up is displayed, but with the yellow character, only the camera close up is displayed. What am I missing?

I made the red character and then just copied it to make the yellow on so each character has the same attachments in the inspector.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class showText : MonoBehaviour 
 {
 
     public GameObject player;
     public Button input;
     public Text NPCtext;
 
     public Camera cam;
 
     public string inputField;
     private int size;
 
     public float distance;
 
     void Start()
     {
 
     }
 
     void Update () 
     {
         distance = Vector3.Distance(player.transform.position, transform.position);
         Debug.Log(distance);
 
         if(distance < 5)
         {
             NPCtext.text = inputField;
             input.active = true;
             cam.active = true;
             
         }
         else
         {
             NPCtext.text = "";
             input.active = false;
             cam.active = false;
         }
     }
 }