Basic Command Binding not working with .NET Standard

• Create a new Master Detail Project template then replace About pagecommand code with basic Debug.WriteLine("Hello Command")
• Deploy to android (API 24)
• goto about page and click button
• command will not fire

This is a general issue i have encountered, this is just the easiest way to reproduce, without custom code snippets.

VS 15.5.4
XF 2.5.0.122203
Android Compile with Oreo (Min target API 21)

NB: This event will fire when deployed to UWP