Bug System.IO not working for brokered filesystem locations in UWP with Unity 2021 (regression)

I have the following code:

Code (CSharp):

1. using System.IO;
2. using UnityEngine;
3.  
4. #if ENABLE_WINMD_SUPPORT
5. using Windows.Storage;
6. #endif
7.  
8. public class Test : MonoBehaviour
9. {
10.     void Start()
11.     {
12.         string localPath = Path.Combine(Application.persistentDataPath, "TestDir");
13.      
14.         try
15.         {
16.             Directory.CreateDirectory(localPath);
17.             Debug.Log("Directory created successfully");
18.         }
19.         catch (System.Exception ex)
20.         {
21.             Debug.LogException(ex);
22.         }
23.  
24.         try
25.         {
26.             Objects3DTest();
27.         }
28.         catch(System.Exception ex)
29.         {
30.             Debug.LogException(ex);
31.         }
32.     }
33.  
34.     [System.Diagnostics.Conditional("ENABLE_WINMD_SUPPORT")]
35.     void Objects3DTest()
36.     {
37. #if ENABLE_WINMD_SUPPORT
38.         try
39.         {
40.             string path = Path.Combine(KnownFolders.Objects3D.Path, "TestDir");
41.  
42.             Directory.CreateDirectory(path);
43.             Debug.Log("Direcotry in Objects3D created successfully");
44.         }
45.         catch (System.Exception ex)
46.         {
47.             Debug.LogException(ex);
48.         }
49. #endif
50.     }
51. }
52.  

Objects3D permission is enabled in the app manifest.
With Unity 2020.3.43 it works fine. After switching to Unity 2021.3.16 the Objects3D case does not work anymore, which prevents us from upgrading (our project needs to run on HoloLens).

Case number is IN-29088.

 

Awesome, thanks!

Do you know by chance when the fix will land in 2021 LTS? We're trying to estimate whether to go forward with the upgrade or to stay on 2020 for another 3 or so months.