I would like to mention that in my experience, this issue does have a potential to worsen over time. As I have encountered it across a 7470 and 7480 now.
"working within specification," maybe, consider 2 years from now, my unit was unusable within that time frame, and now i feel I've been handed a replacement with 2 years of usability left in it, out of box.
Looking forward to see if real responses to this problem arise.
Its 2019 and their still handing out laptops with a known issue from 2017....
I do appreciate the work that you have done on this issue.