Help! Annoying Transition Screen Flash in iPhone 5s

I think since I upgraded to 7.1 (but may be before), whenever the icons are zooming in or out of transitioning animation, I see this white flash (lasts one to two seconds) on the left upper edge of screen. Is this a hardware or software problem? It happens on home screen and in apps, all during initial transition animation.

I have tried to restore, but still having problem.

Never-mind: should have searched harder on this forum. It has to do with a long named icon on the second row, second column. So weird. Kudos to people who figured that out...

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