2 year user

Ive had my Fitbit flex for 2 years, so Ive been through a few app updates. Generally it works fantastic, but since the last update I cant seem to join challenges when others invite me, only when I start them myself. It shows me on the list as if Ive joined, but also only shows that Ive been invited.

Carter_katie02 about Fitbit: Health & Fitness, v2.30