I also noticed that I got a new flamethrower
https://i.imgur.com/KJ9w0XZ.jpg
yeyy!!!! bugy-soft did it again...
there was a similar problem with assassin creed origins with the rewards a lot of people dodn't get the reward and the support didnt help em unless they had a screenshot of the completed chalenge
to be on the safe side take screenshots of the completed challenge and the inventory before the challenge ends and be ready to bug the support team via live chat not message