Arena is still not detecting that I own Team Fortress 2 for the Steam quest this week despite me "playing" it already for 4 or 5 hours. What gives?

Banana Hell: Mountain of Madness Steam giveaway https://store.steampowered.com/app/2068520/Banana_Hell_Mountain_of_Madness/

"Undercroft warriors" giveaway on Steam https://store.steampowered.com/app/2547140/Undercroft_warriors/