This Navigation Bar Transparency problem began when Apple made Dark Mode. I told them about it and Apple fixed it but they have broken the Nav Bar again in iOS 15.

From Apple to me re: Feedback reply Mar 18, 2021 at 4:57 PM – FB9047661: Xcode Simulator Accessibility Spoken Content Problems Xcode & crackling speaker output while simulators are open on Macs running Big Sur: Apple: After reviewing your feedback, we have some additional information for you, or some additional information, or action is necessary for this issue: Please verify this issue with Xcode 13 Beta 5 and update your bug report with your results by logging into https://feedbackassistant.apple.com/ or by using the Feedback Assistant app. Xcode 13 Beta 5 (13A5212g) https://developer.apple.com/download/ Posted Date: Aug 10th, 2021 For a complete list of logging instructions visit: https://developer.apple.com/bug-reporting/profiles-and-logs/ My reply to Apple: Sorry, I do NOT run Beta Softwares on my machines anymore. I will let you know how the final Gold Master release works.