Re: Under on Flag bug
I can high recommend this fix since you are on the PC version of the game.
https://www.reddit.com/r/BattlefieldV/comments/9xihbd/how_to_fix_glitched_war_stories_challengesletters/
It has worked for me and a lot of other players with this same issue.
https://www.reddit.com/r/BattlefieldV/comments/9xihbd/how_to_fix_glitched_war_stories_challengesletters/
It has worked for me and a lot of other players with this same issue.