Hello, I found a visual bug in iOS 27 when using YouTube in the background. Steps: Play a video on YouTube. Lock the iPhone while the video continues playing. Long-press the Lock Screen. Before the customization menu opens, observe the YouTube media player. Issue: The YouTube media player rapidly flickers/flashes approximately 10 times before the customization menu appears. Expected: The transition should be smooth without flickering. Device: iPhone 15 iOS: 27.0.1 I can provide a screen recording if needed. Thank you.