Link Error for Xamarin Forms in Release Mode

I have a Xamarin forms project that compiles, links and runs in debug mode but when I try to link in release I get the following error:

Xamarin.Android.XamarinAndroidException: error XA2006: Reference to metadata item 'System.Void Android.Animation.AnimatorListenerAdapter::OnAnimationPause(Android.Animation.Animator)' (defined in 'Xamarin.Forms.Platform.Android, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null') from 'Xamarin.Forms.Platform.Android, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' could not be resolved.
at Xamarin.Android.Diagnostic.Error(Int32 code, String message, Object[] args)
at Xamarin.Android.Tasks.LinkAssemblies.Execute()
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.d__20.MoveNext() PsariPhapps.Android

Any ideas would be appreciated.

Thanks