Flag Driver Medal Wont Unlock

Recently I’ve been finding that playing for k/d isnt holding my interest so instead I’ve decided to try and earn some of the more elusive medals. For some reason I’m having a lot of trouble with getting Flag Driver to unlock. I’ve driven about 20 flag carriers to my capture point and the medal has only unlocked for me once…I have no idea what I did that one time that allowed it to unlock. Has anyone else had this problem? I’d just like to know how exactly you’re supposed to earn this.

Bump. No one has experience with this?