This happens based on when X-Plane decides to load new weather for a closer METAR location. The pause has ALWAYS been there in X-Plane, though it can be a bit more noticable with SkyMaxx Pro dependent on system because in SkyMaxx Pro no two clouds look alike, so X-Plane has to re-render the scene. In default X-Plane weather, the clouds are almost always, if not always, the same/alike, thus the load time to render that scene is much less time to calculate. We are going to look into this some, but I'm honestly unsure if we'll be able to work around it. This is just a limitation of X-Plane for the moment.