dotnet-bluetooth-le: BLE does not scan

Steps to reproduce

1. Plugin has been added as suggested.

2. Visual studio and Xamarin.Forms are updated to the latest version.

3. Code attached below

using System;

using Android.App;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Plugin.BLE;
using Plugin.BLE.Abstractions.Exceptions;
using System.Collections.Generic;
using Android.Bluetooth;
using Whale_Watch.Droid;

namespace Whale_Watch.Droid
{
    [Activity(Label = "BLE_Test",  Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
        protected async override void OnCreate(Bundle bundle)
        {
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;

            base.OnCreate(bundle);

            global::Xamarin.Forms.Forms.Init(this, bundle);
            LoadApplication(new App());
            await scanAsync();
        }
        public async System.Threading.Tasks.Task scanAsync()
        {          
            List<Plugin.BLE.Abstractions.Contracts.IDevice> deviceList = new List<Plugin.BLE.Abstractions.Contracts.IDevice>();
            var ble = CrossBluetoothLE.Current;
            var adapter = CrossBluetoothLE.Current.Adapter;
            var state = ble.State;           
            adapter.ScanTimeout = 200000;
            adapter.DeviceDiscovered += (s, a) => deviceList.Add(a.Device);
            await adapter.StartScanningForDevicesAsync();            
        }      
    }
}

Expected behavior

It should scan for all nearby Bluetooth le devices.

Actual behavior

It will run the code and no errors are formed, however even though there are ble devices visible it does not return any or add them to the list. I am unsure if my code is at fault.

Crashlog

Does not crash or cause an exception

Configuration

Version of the Plugin: 1.3.0

Platform: Compiled using Android 8.1

Device: Moto E4 Plus, but will also occur on all other devices tested.