I received my 5+1 GM and the car I opened had the front bumper problem.
I was disapointed and put them all back in the box, did not look at the others.
I assumed all of the bumpers were bad.
Of course, my GM came with a bent corner on the card enclosure.
The other 5 were good cards.
I guess I will check the other 5 bumpers and report back.