Android Fails to completly Load expansion file.

Some users ( not all ) are reporting that the game crashes after loading the expansion file from memory or gets stuck somewhere during loading. I am using the tutorial found with the official obb plugin from the asset store. What could be causing this? Why does unity have to unload the expansion file every time they start up. I am getting reports on Nooks, Galaxy Tab II 7.0, Galaxy Tab 2 10.1,Xperia J. I am not however getting any crash reports from the play dev center. Just emails and bad reviews saying it exits them back to the homepage.