Same issue.
Hi folks! We're very sorry about the delay. Please know that you can accumulate the Feathers, so please feel free to hang on to them until we can get this resolved for you. It's top of our priority list so our team is working as quickly as they can to get this side event right as rain as soon as they can! Thanks again for your patience and understanding. We really, really appreciate you all sticking around!
Same problem.
I had only 1 yesterday. Now I have unlocked 2 as well. I’m looking for 5 and 6 still