Great news - you'll have to report back what they do. I'm assuming a module revision means they will install the 2018 charging module - don't really see how they could modify the 2017 module.
Same issue on my 2017 Yukon Denali - most of the time the driver's side will not be as flat as the passenger side. I too looked for obstruction, etc. - found nothing. If I cycle the electric folding mechanism a couple of times the driver side will eventually lay flat. If I can duplicate it I'll have dealer address at next visit.