Oxyplot doesn't rapresent correctly double number on android phone

Hello to everyone! I developed a android app on Visual Studio with Xamarin. My app comunicate with a Arduino board and retrive me a html with a temperature value. The app running without problems both in debug mode than in release, but when I create the apk and install them on the phone the graph doesn't rapresent the double value of temperature on y axes. I try to cast to int the double values of temperature, but on the phone nothing change. Anyone Can help me?