Fortnite challenge blocked?

So far, I have completed all fortnite challenges from every week except one. This one uses the x 4 biplane stormwing in various matches. That should be easy but I can do what I want and nothing happens. I have tried it in all different game styles and it does not work. Is that the same with you?

At the moment Fortnite is unfortunately very verbuggt.

We hope we can fix the bug soon.

Unfortunately, we received this message from several players.

The more that is why the more urgent it is classified in the support, so please report it to the support under https://www.epicgames.com/...ce?lang=de