Weight of the wing.
They don't pop up too well at the best of times.
Worse over age.
A few solutions. Wingless, a CF painted wing, a 34 wing
Increase the height of the 2 rubber bung thingys and just force it closed. (so it pops up a bit more and doesn't relatch itself.
Could try some method of strengthened bars at the very back of the boot.
Ps. never put your head in when you look for something and let go of the boot