Xamarin forms Android is timed out when app goes into background

Hi,

I have an Android app that is developed using Xamarin Forms. Session on this app is valid for 60 minutes and works fine on all devices except on S5 version 4.4.2. User gets logged out of the app once the app goes into background on S5 version 4.4.2. Any input on how to keep the session alive?

Thank you,
Latha