I have the same problem as well. I set up my controls to use "space" to pan while moving the mouse. After the new update , I try to pan and the camera automatically moves to the center.
Now, I also use windowed mode on FSX-SE, and when I first try to pan (Camera moves to the center) , I can't access other tabs. When I switch to the task manager, I can switch to other tabs, but I can't pan or switch to any views. Tried to switch to the non-experimental versions and the problem still occurs. I was using the PMDG 737 when that occured, and I was not able to click on switches and buttons.
Laith