When you select "SILENT" in Android 5.0, you are actually selecting "No interruptions" which means that you don't get any notifications, not even LED. This is standard for Android 5.0.
In our latest update we have however changed this so the LED is still active when you select silent. But depending on where you bought your phone (country and operator) you may not have received this update yet. When you receive the update to our latest software, the LED will work in silent.
