Multiple Asset Bundle download at the same time crashes the App

I have close to 10 asset bundles containing animated texture sequences. When i start the first scene with the QCAR camera as the viewing camera here, the camera just freezes for a while and then the app crashes. I am trying to stream all the app data as much as possible to ensure the size of the app doesn't grow too big. How to prevent all the assetbundles from downloading at the same time?Is there a more efficient way to manage the downloading process of asset bundles?