Double map change loading time
It has happened twice now going into WvW
This sort of thing happens to me whenever I go into the borderlands and often when porting into a city. Usually the region’s ambient sound kicks in at the same time the loading screen backdrop flickers (I don’t see my character at all, though, but this is likely due to differences in machine power or gfx cards). I suspect it’s you being dumped into the zone before all the visual environment is actually loaded up.