It’s interesting that you say this issue only occurs when data augmentation is applied. Is the issue consistent whenever there are any augmentation steps?
Just to double check, YOLOv7’s annotation format uses the following format:
class_id center_x center_y width height
With the measurements being normalized from 0-1. (x: x/image width, y: y/image height, width: width/image width, height: height/image height)
If the issue persists, would it be okay to duplicate your project to troubleshoot this?