I got the same issue. Never seen those drops in game even though I claimed all 3 drops in Twitch. I am sure my WF account was linked to my Twitch account and was told to contact the developers of corresponding game. 😞
I got the drops this morning. 10 hours passed since I posted my issue. 7 days passed since I claimed my drops in Twitch. I would say give DE a week to deliver drops to you. Hope my experience can help you, if you do not receive your drops immediately and are looking for a solution.