Thank you for the information.
We were able to reproduce the problem. We will put our efforts on it right now.
You can track it using the following link:
The problem is happening when the Dock property of element host is assigned to Fill. As workaround you can handle the form resize event and change the Dock property to None when the form is minimized.
The sample code is below.
sender, EventArgs e)
.WindowState == FormWindowState.Minimized)
.elementHost1.Dock = DockStyle.None;
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