I've attached the x2goclient (4.0.3.0-20141021-debug) log and the
VcXsrv log of when this bug is triggered

The  X-Server command line options I am passing are shown in the .png. They are:
-multiwindow -notrayicon -clipboard -logverbose 3

-logverbose 3 does not do anything.

On IRC, user nkef posted a practically identical VcXsrv log:
http://pastebin.com/raw.php?i=5Dj2rx5y