I also have the problem whereby in the sim I can pan around normally as long as CP is active on the same screen. as soon as I move CP to my second monitor and click back into the sim it almost entirely stops the panning, if I click CP and make it active then panning in the sim is back to normal.
I think its something to do with CP having to have focus. I say this because I have other software behaving similar.
I have tried reloading CP as Administrator but that didn't work