I won't pretend to understand this, but it's a repeatable problem. DisplayFusion has a great feature that lets me lock the mouse cursor to a particular monitor, which is really handy when playing full-screen games that aren't smart enough to do this. Unfortunately, I find that when I use the feature it has a strange side-effect: every so often DisplayFusion drags me back to the desktop.

For example, I was playing Gotham City Imposters a couple of nights ago, and I was using DisplayFusion's feature to lock my cursor to my main monitor (largely because I had the monitor to my right turned off and didn't need the cursor wandering over there while I was trying to shoot my opponents). Every couple of minutes I was getting yanked out of the game and dragged back to the Windows desktop. As soon as I closed DisplayFusion the problem went away.

Since then I've taken to closing DisplayFusion before I play games, but that's a little irritating both because I then lack the cursor-lock feature and have to restart it when I'm done. Is there any workaround for this? Is it a known problem? If not, can I help with it somehow? Thanks in advance!

Good question. I only noticed it when using the locking hotkey, but I'll run some tests tonight and get back to you with more data.