I noticed that with version 5 the 3D view gets updated after every action in PCBNew. Since this happens even if the viewer is minimized or otherwise not visible on the screen, it is nearly impossible to work on a layout with the viewer open. My current project is a rather big PCB with many components and it takes 1.4s to refresh the view, which means after every action in PCBNew I have to wait this time until I can use PCBNew again. Is there a way to deactivate this feature? Closing and opening the 3D viewer every time is no alternative, I liked the way v4 handled it best (refresh happens only if the viewer window gets focus again).