Not sure if you answered (I may have missed it?) - that if you change the options to Windowed Mode (rather than Full Screen or Borderless) does it still happen?
Digging around, I found a few sites:
http://msdn.microsoft.com/en-us/library ... 85%29.aspx
One thing - in your config - it says:
resolution = "1920 x 1080"
Is that your native screen resolution? If not, change the size settings to your native screen resolution. See if that works?