AssetBundle LoadAsset and UnityWebRequestAsyncOperation complete at same frame freeze game

Unity Engine
,
1

See the attachment pics.
AssetBundle.LoadAsset(name) and UnityWebRequest completed at the same frame freeze the game.
Reproduced in Unity 2019.4.20f1 and 2019.4.12f1.

6858080--799415--CDC844D7-64CF-4F90-A913-7DFBAC03FEC5.jpg
6858080--799415--CDC844D7-64CF-4F90-A913-7DFBAC03FEC5.jpg506×947 186 KB

6858080--799418--B201812F-9F12-42A0-B594-6560F5C0D45F.jpg
6858080--799418--B201812F-9F12-42A0-B594-6560F5C0D45F.jpg495×574 86.6 KB

6858080--799421--F6FFE81A-03AE-4189-A719-95FAF4002AD9.jpg
6858080--799421--F6FFE81A-03AE-4189-A719-95FAF4002AD9.jpg504×950 164 KB

2

We seem to have a similar issue when loading a lot of assets. We are able to reproduce it with Unity 2019.4.19/20/21. This doesn’t seem to happen in editor, only on device (Android and iOS).

6884168–804374–symbolicated_crash.txt (153 KB)

3

To everyone interested, this is a known issue (at least in our case): Unity Issue Tracker - [Mobile] Calling Resources.Load() while asynchronously loading assetbundle by UnityWebRequest makes main thread stuck.