I'll try my hand at explaining too:
The original problem affected some people but not everyone. But we had no idea of how to predict which individual players it would affect, just which models these players could be. All we knew what that some individual players would get it, and some wouldn't. The problem would cause the players to freeze up, sometimes unnoticed during shutdown, and possibly drain the battery. This was bad. Very bad. So we found a fix for it. The problem with this fix was that since we didn't know which individual players would have the problem, we had to put the fix on all players within the category. The fix includes that quick bit where it shows the image on shutting down. There is no way to avoid this, but it causes no harm.
So in order to fix a really bad bug for some people, we had to include what appears to be a really minor glitch (but really isn't) for everyone. It causes no harm. Ignore it.