unity3d - Unity WebGL 无法正确卸载和加载可寻址场景

Question

我正在尝试卸载先前添加的场景，然后按该顺序添加加载另一个场景。我使用下面的代码来做到这一点。此代码在编辑器和除 WebGL 之外的所有平台上都能正常工作。我知道 WebGL 不适用于异步代码，但这使用了一个协同程序，它应该在主线程上执行。那么，为什么这在 WebGL 中不起作用？

        private IEnumerator UnloadAndLoadNextScene(IslandKey island)
        {
            // Avoid loading the same island twice.
            if (island.ScenePath == previousIslandScenePath)
                yield break;

            string islandScenePath = island.ScenePath;
            previousIslandScenePath = islandScenePath;

            // Don't unload and load until previous unload and load is complete.
            while (processingUnloadAndLoad)
                yield return null;

            // Immediately set processing unload and load to true to
            // lock this method to only one instance at a time.
            processingUnloadAndLoad = true;

            // Unload previous scene.
            if (unloadSceneHandle.IsValid())
            {
                AsyncOperationHandle unloadingScene = Addressables.UnloadSceneAsync(unloadSceneHandle);
                yield return unloadingScene;
            }

            // Load scene.
            AsyncOperationHandle<SceneInstance> loadingScene = Addressables.LoadSceneAsync(islandScenePath, LoadSceneMode.Additive);

            yield return loadingScene;

            if (loadingScene.Status == AsyncOperationStatus.Succeeded)
                unloadSceneHandle = loadingScene;

            ...

            // Unload and load is now complete, so unlock method.
            processingUnloadAndLoad = false;
        }
    }