We also have a jetta and it does the same ...it opens more often on hot days from remote ...I also found it was slow opening at the top and I used to push it to fully opened till I heard a pop and I'd snapped s end off one gas strut ..I bought a genuine one from tps £30 and popped it on ..boot opens more on remote now so if I'd changed both I recon it would pop on remote every time just couldn't justify buying two lol
sent using my own fingers