I have "solved" this by attaching some velcro to the underside of the front of the flap and also to the upright so when one closes the dood you extend your arm through the open window and attach the Velcro strip to the upright. When you open the door the Velcro detaches enough itself. this then prevents the flap flying up at speed and letting the rain in underneath!
Other solution is a post 2022 cx Plus model with the modified hood!!!!!!!!!!!!!
Cheers
