Clicking while in the game window will center on Scene window.

I've been having this issue for a while now:

I'll have multiple windows open in the unity editor: the Game window, the scene window, and a couple of others. When I'm in play mode and my mouse is in the game window and I click (like when I'm trying to click on something in my game) it will center the mouse on the scene window on the other monitor.

edit: (This also happens when the animator window is open)

This doesn't happen when I make a standalone build or use the Build & Run thing, obviously.