[sigvoror]

Sense is kinda a memory hog. So if you are switching around through some other memory intensive applications, Sense can get closed to free up memory. Then, of course, when you go back to your home screens, Sense has to restart. Because it uses so much memory, it can take a few to fully boot up. This is why you get the loading screen, and why even after that is done, you will see apps still loading. I almost never have this issue if I'm running a replacement launcher, when opening the replacement launcher.