Peons

Not a bug, you'll need to do an arc that awards credit for this badge in order to get the gold medalist. This is how it was in live as well, you can use https://paragonwiki.com/wiki/Hero_Merit_Rewards#Flashback_System as a reference (Badge Missions are marked with . They do not award badges for challenges, even if you choose challenges. Reward Merits are given for them when done as a flashback but not when started from a contact. )