If the camera lens cutout appears oval-shaped, it is likely caused by a loose carriage.
Please follow these steps:
Refer to the instructional video to refit the carriage onto the guide rail.
Pay close attention to the finger positioning in the video — before tightening the screws, press down on both the top and bottom ends of the carriage to ensure there is no extra gap between the carriage and the guide rail.
https://osscdn.mietubl.com/video/202508141713.mp4
After securing it, perform another cutting test to confirm that the issue is resolved