Data is not populating in WPF Form

I am working on a VSTO Excel Addin and on a button click I am opening a WPF form.

case 1: I am working on a Citrix environment and Citrix opened on a single screen now I open excel and click on my ribbon button and my WPF form is working fine. But when I drag my cirtix window from single monitor to dual monitor my wpf form goes blank as present is screenshot.

case 2: I am working on a Citrix environment and Citrix opened on a dual screen(on both screens) now I open Excel and click on my ribbon button and my wpf form is working fine. But when I drag my cirtix window from dual monitor to single monitor, my wpf form goes blank as above.

I am using show dialog for displaying WPF form.

var prepareViewForm = new WpfContainerForm(objPrepareView, (int)Globals.ThisAddIn.Application.Width, (int)Globals.ThisAddIn.Application.Height);
prepareViewForm.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
prepareViewForm.HideWindowBezel();

var result = prepareViewForm.ShowDialog();

I have tried changing properties StartPosition from CenterParent to Manual. Tried fixing the positions of the form but also did not work.

How can i fix this problem?