What is causing my siding to melt?

[Mindy Jensen]

We are considering a new house to live-in flip. The brand new siding (installed June/July 2019) is melting above the front door. Located in Colorado, and it's been hot the last few weeks.

There is no window next to the siding, just a roof. I'm wondering if there is inadequate ventilation in that roof? 

Seller has a warranty, so they're having it repaired, but I'm concerned about next year.

@Jim K. I know you're a DIY guy. 

[Richard Sherman]

@Mindy Jensen Look at the home that is facing that side of the house, it is most likely reflective sunlight from low E or high reflective windows in a building facing the home (or maybe your own home it is hard to see the layout.)  This is VERY common as more houses get high efficiency windows.  

Absolutely also possible that the corner there near the roof gets very hot and they are touching the roof shingles.  I am not an expert, but transition to the roof looks a bit odd, is there a step flashing behind the siding there?