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The issue you're experiencing with accidental touches along the edge of the screen during gaming in landscape mode is related to the full-screen gesture recognition system. The design of the Xiaomi 15 Ultra’s gesture-based navigation system includes a certain sensitivity at the edges of the screen to allow for easy access to back, home, and recent apps. However, when holding the device in landscape mode for gaming, the edges of the screen can sometimes register unintended touches or gestures, which can disrupt your gaming experience. This is not a problem with the screen itself, but rather a result of the current recognition logic built into the full-screen gestures. It is an intended feature of the phone's navigation system, which can occasionally cause accidental inputs while playing games or using the device in other ways.
To improve your gaming experience and avoid accidental touches, we recommend temporarily switching from full-screen gestures to the classic navigation mode (using on-screen buttons for home, back, and recent apps) while gaming. This will reduce the chances of unintended gestures being recognized and help you focus on your game without interruptions.