The spring might be getting old and worn out. I remember a few times when I was locking my car the locking pin for the gas door hit the tab inside at the right angle and the door popped completely open. I've had to replace that spring 3 times now.
1999 Techno Violet Metallic M3
Bilstein | Kosei K1 Racing | Toyo Proxes R888 | BMW CCA #430881