https://discussions.unity.com/t/loadsceneasync-loadlevelasync-freeze-at-90-for-large-scenes/612667
LoadSceneAsync / LoadLevelAsync freeze at 90% for large scenes - Unity Engine - Unity Discussions
Jan 15, 2016 - My project has had an issue with LoadLevelAsync (now LoadSceneAsync) where it freezes (blocking the main thread) when loading large scenes. This happens in the...
unity enginefreeze