I am unable to see anything wrong in the attic of this house but this just looks like it is not right. The rest of the home looks fine except this one side. I walked on the roof and it was not soft anywhere. Just seems like framing shouldn’t be that pronounced. This house is less than a year old.
Do you have pics from the attic for that side of the roof that you can post?
Possibly applying the insulation prior to the roof decking? Once placed, the insulation would compress exposing the rafters? 
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Plus, with the lumber used these days, conventional framing telegraphs more irregularities (sheathing)than a trussed roof framing system.
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Isn’t that just radiant sheathing basically osb with a radiant barrier on it. I am in South Carolina.
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Your looking at the butt joints and seams in the plywood, not the rafters,
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I’m in Minnesota. We don’t use that crap here!
A Radiant barrier also acts as a moisture barrier.
In MN, that would lead to ROT (and swelling at the butt joints and seams)!
You are correct.
The angle of the sun is really emphasizing the planing issue.
Were there any lifted shingles along the humps?
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I wouldn’t be surprised if that happened here too with our high humidity. The house across the street had rotted rafters in less than a year. Pretty sure I will be doing this whole neighborhood and becoming really good friends with the builder soon. 
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No everything was fine except the front of the home had shingles that were too worn for only a year on the house.
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I see that now.
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Yea that makes sense.
Just throwing it out there, the shingles may be expanding at a different rate at the seams because of the foam between the rafters, 
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There is no foam.
It’s just foil glued onto osb.
And it’s perforated
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I was close…maybe… 
It sure looks like foam board cut between the rafters,