@Banck Yeah, I did. I confirmed this problem was fixed on 14.6 RC.

iOS 14.6 beta 2 still has this bug.

This is fixed by iOS 14.5 beta2. Today, iOS 14.5 was released. But, iOS 14.5 has new bug about CallDirectoryExtension. see https://developer.apple.com/forums/thread/670737

iOS 14.5 RC also has this bug. Apple does not fix this problem.

iOS14.5 beta 7 also has this bug. Does Phone menu creating process call sleep(30000) before drawing???

iOS 14.5 beta 6 still has this critical bug..

On iOS 14.5 beta 5 Phone Settings - 'Call blocking & Identification' menu is delayed to shown while 30 seconds. This problem is from iOS 14.5 beta 2. also, iOS 14.5 beta 5 has this problem. And, CallDirectory Extension app CXCallDirectoryManager.sharedInstance.getEnabledStatusForExtension method consumes between 30 seconds to call completionHandler and throws error first calling. This is critical bug for Call Directory Extension app. my Feedback no is FB9052497.