Light shining effects can repeatedly be observed on older iPhone devices (12/13/14). This change is often seen after the device is rebooted or after a SystemMemoryReset.ips (System Analysis Data). It changes very often...
Visual glitch iOS 26.1 Home screen: Different rotated Liquid Glass effects after reboots
You've raised this before on these forums, but you're in the wrong place.
These Developer Forums are for developers from around the world to ask for hints and tips on coding apps for Apple's platform. We aren't employed by Apple, so bugs posted on here won't get anywhere.
You need to raise each issue you find separately at https://feedbackassistant.apple.com/ You can post the FB numbers here if you want, so that others can track them.