Working fine on Windows Phone but crashes when running on Android - Why?

Hi all,

I am experiencing problems with the android version of my app. Everything works great when running on WP but as you as I run it on Android it crashes.

I have an example here:
https://github.com/sebastienjouhans/XamarinFormsPlayground

press the 'Next Page' Button then the 'List view with comm service'
here two things happens.

1) the binding on command this.ItemSelectedCommand in the ListPageViewModel does not bind

2) the communication service fails on line 63 NetworkResponse<TResponse> networkResponse = null;

Are they any reason why the code would run fine on WP and fail on Android?

Many thanks