windows phone app, lock the screen or press home kye ,then unlock the scene crash

What happened I use unity5.2.3f1 and windows phone sdk8.0 ,i public the app and install it to my windows phone, the app is normal , but when i press home key or lock the sceen ,the scene can not back , instead ,it is black and then crash. When i debug the project ,I get the error 'trying to reload asset from disk that is not stored on disk '

How we can reproduce it using the example you attached First, you build the project to a windows phone project. windows sdk is 8.0 Second, you run the project in VS2012 and install it to a windows phone. Third, run the app and enter the scene, then , press home key or lock key. when you unlock or want to press it back, it could not back ,intead it is becoming black and crash.