Ok, this might sound crazy, though bear with me:
First time using supercharger since installing 17.6.15 FW.
Back up as normal, get out of car to charge and grab handle. Move handle toward charge port and think "oh, I must have pressed the button to open charge port door already". Half asleep I don't think anything unusual.
I'm on 17.8.16 on a early refresh ap1 and have been thru over 15 SC's in the past few days (on a trip) and have not had that occur. Always half to hit the button to open.