ListView item images misplacing and disappear sometimes while scroll up/down in Xamrin.Form

Hello

I have read few blogs but didn't find solution of it.

When I scroll Up/Down, some image misplace and some image disappear. I have review my code and given enough time to get rid of the problem. But unfortunately I didn't find any way to resolve this.

Can anybody please guide me? I check with iOS.

EmployeeResultsPage

<ListView x:Name="EmployeeResultsListView"
          ItemsSource="{Binding EmployeeResults}"
          RowHeight="200"
          IsPullToRefreshEnabled="true"
          RefreshCommand="{Binding RefreshDataCommand}"
          IsRefreshing="{Binding IsRefreshingData, Mode=OneWay}"
          ItemAppearing="Employee_ItemAppearing"
    <ListView.ItemTemplate>
        <DataTemplate>
            <local:EmployeeResultViewCell />
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

EmployeeResultsPage.CS

private void Employee_ItemAppearing(object sender, ItemVisibilityEventArgs e)
{
    var itemObject = e.Item as ExtendedEmployee;
    if (_viewModel.EmployeeResults.Last() == itemObject)
    {
        if (_viewModel.LoadEmployee.CanExecute(null))
        {
            _viewModel.LoadEmployee.Execute(null);
        }
    }
}

EmployeeResultViewModel

[ImplementPropertyChanged]
public class EmployeeResultsViewModel : ViewModelBase
{
    private async Task LoadEmployee()
    {
        EmployeeResults = GetDataUsingAPI(); //15 records per call
    }

    public ObservableRangeCollection<ExtendedEmployee> EmployeeResults { get; set; }

    public string EmployeePhotoUrl { get; set; }
    public string EmployeeName { get; set; }
}

EmployeeResultViewCell

<ViewCell.View>
    <Grid RowSpacing="0" ColumnSpacing="0" VerticalOptions="Center" HeightRequest="150">
        <Image x:Name="EmployeeImage" Grid.Column="0" HeightRequest="150" WidthRequest="150"
        Source="{Binding EmployeePhotoUrl}" />
        <Label Text="{Binding EmployeeName}" FontSize="18" TextColor="Grey"/>
    </Grid>
</ViewCell.View>

CS File

public partial class EmployeeResultViewCell : CustomViewCell
{
    public EmployeeResultViewCell()
    {
        InitializeComponent();
    }

    protected override void OnBindingContextChanged()
    {
        base.OnBindingContextChanged();
        var employee = (BindingContext as ExtendedEmployee);
    }
}