Prism/DryIOC object not updated after injecting in ViewModel constructor

I'm running into an issue where an object injected via Prism's container doesn't have the correct values after it's injected to the ViewModel constructor. I've created a sample to illustrate the problem. I can't post links, but it's on Github /RikDriever/DITest

Basically what I'm trying to do is:

• Create an instance of an object in App.xaml.cs
• Register the instance with the container
• Update the object asynchronously while a splash page is displayed
• Navigate to the MainPage when the updating is finished
• Use the object in the MainPageViewModel constructor

The problem lies in the fact that when I'm assigning a new instance of the object to the instance that's registered with the container, the values aren't copied. So this doesn't work: _myData = await MyDataFactory.GetDataAsync(); because GetDataAsync returns a new MyData object. In the sample project I've commented out a line that does give the desired results, but it's not asynchronous: MyDataFactory.GetData(ref _myData);

Any ideas or should I perhaps rethink my design and use another way to get the data to the MainPageViewModel constructor? I should mention that several ViewModels in my real project use the same instance of the data object.