iOS14 - Standard Browser keeps changing back to Safari

With the release of iOS 14, I immediately took the chance to switch my standard browser to the DuckDuckGo App.

I go to Settings -> DuckDuckGo (my browser app) -> Standard-Browser-App and change it to DuckDuckGo (instead of Safari).

At first this works. But each time I restart my phone it keeps changing back to Safari. I want to switch it permanently to DuckDuckGo.

Did anyone face this problem yet? I think you can replace DuckDuckGo with any other 3rd-party-browser as I am assuming it's an iOS, problem not an App specific problem