AssetBundle LoadAllAssetsAsync freeze Unity Editor 5.3.3p2 (64-bit).

I want to load AssetBundle content in background load. To do this i use LoadAllAssetsAsync() (http://docs.unity3d.com/ScriptReference/AssetBundle.LoadAllAssetsAsync.html) and works fine on StandaloneWindows and Android builds. But in Editor, **when AssetBundle is running LoadAllAssetsAsync()** if i sellect or try to expand some GameObject in Hierarchy Window, i got freeze until LoadAllAssetsAsync() finish. And i get same problem when i try to check, change or move some value in Inspector. Also with script way: when i change a UI.Text font. This freeze is only on Editor and while LoadAllAssetsAsync() is running, but i would like to know how to fix it. Someone else happens this problem? Thanks in advance. Updated: Tried and get freeze in 5.3.1f1, 5.3.2f1, 5.3.3p1 and 5.3.3p2.