Image.FromStream mono memory leak - memory-leaks

Question

I believe I have stumbled across a memory leak in Mono 4.6 and 4.8 using the Image.FromStream call. Below is a code snippet that can be used to reproduce the problem. I have tested this in Ubuntu 16.04 LTS with Mono 4.6 and 4.8.
I have posted a Visual Studio/MonoDevelop solution and project (in a tar.gz file) here: BitmapTest.tar.gz. After extracting BitmapTest.gz, rename BitmapTest to BitmapTest.tar.gz so you can extract the code.
This project is a simple Winforms app that runs the code below.
Is there a work around, or something I am not considering?
EDIT:
If I use
using (Bitmap srcBitmap = (Bitmap)Image.FromFile(_file_name))
instead of
using (Bitmap srcBitmap = (Bitmap)Image.FromStream(ms))
It works. The problem seems to be in Image.FromStream.
// populate our byte[] array with a .BMP file
ImageConverter convert = new ImageConverter();
private byte[] _sourceArray = (byte[])convert.ConvertTo(Image.FromFile(filename_string), typeof(byte[]));
// put the following code in a loop
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(_sourceArray))
{
System.Diagnostics.Trace.WriteLine("First memory stream created OK size: " + ms.Capacity.ToString());
using (Bitmap srcBitmap = (Bitmap)Image.FromStream(ms))
{
System.Diagnostics.Trace.WriteLine("First Bitmap created OK size: " + srcBitmap.Size.ToString());
}
}
// If GC is called then the memory climbs slower
if (_forceGC) {
GC.WaitForPendingFinalizers();
GC.Collect();
}