This is simply user error. They released a software fix today via an OTA - Over The Air update to prevent users from accidently hitting the frunk button twice in quick succession and now it takes one push and then a long hold of the button on the second push to release the frunk now and it limits the car to 26mph if that does happen with a new visual warning on the main screen. https://www.corvetteblogger.com/2020/08/25/video-tadge-juechter-shares-key-fob-changes-as-gm-pushes-c8-frunk-update-to-dealers/
My lowly C6 will not allow the rear hatch to release if the car is in gear, even if its not running. Odd that owners are tripping the frunk to open.