Addressables.LoadSceneAsync Percent Complete not updating on WebGL?

Context:

I'm working on a WebGL build that consists of a very minimal bootstrap scene that then loads a fairly large initial core game payload that's contained in a single scene. I'd very much like to be able to monitor the progress of the load so I can present some simple but diverting content in the interim. Very basic stuff, right?

However, when I test this, PercentComplete jumps immediately from 0 to .5 and then continues to hang at .5 until the scene is completely loaded. I'm testing this with a remote server on a veeeeery slow connection and the payload is relatively large, caches are cleared etc, so I would expect to see the progress slowly increment like it would with SceneManager.LoadSceneAsync (etc).

I'm using Unity 2018.3.12.f1 / Addressables package version 1.5.0

Here's my very simple bootstrap code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.AddressableAssets;
5. using UnityEngine.ResourceManagement.AsyncOperations;
6. using UnityEngine.UI;
7.  
8. public class BootstrapController : MonoBehaviour
9. {
10.  
11.     public string NextSceneAddress;
12.     public float percentDone = 0;
13.     [SerializeField] private Text LoadingText;
14.     AsyncOperationHandle handle;
15.  
16.  
17.     // Use this for initialization
18.     void Start()
19.     {
20.         StartCoroutine(Bootstrap());
21.     }
22.  
23.     IEnumerator Bootstrap()
24.     {
25.         yield return null;
26.  
27.  
28.         handle = Addressables.LoadSceneAsync(NextSceneAddress);
29.  
30.         int i = 0; //increment; otherwise useless sanity check that the while loop is looping...
31.         yield return null;
32.  
33.         while (!handle.IsDone)
34.         {
35.             percentDone = Mathf.Floor(handle.PercentComplete * 100.0f);
36.             LoadingText.text = i++ + " Loading " + percentDone.ToString() + "% Done";
37.  
38.  
39.             yield return null;
40.         }
41.         // else scene should load automatically, right?
42.     }
43.  
44.     private void Update()
45.     {
46.      
47.     }
48. }

 

I guess it's not surprising that the same issue occurs with LoadAssetAsync<T>().

 

@unity_bill I'm seeing this issue as well in WebGL builds.

 

I have the same issue. This was also reported before, I think. https://forum.unity.com/threads/asy...-a-parameter-in-function.668317/#post-5421804