Apple Silicone MagSafe Damage

Has anyone else noticed permanent wear on the back of their silicone MagSafe case for iPhone 12? I don’t own a MagSafe charger, wallet or anything.. but do own the blue MagSafe silicone case. There appears to be permanent wear/damage that seems to be in a perfect circle matching the location of the MagSafe ring of magnets, however never been connected to a MagSafe accessory. I know there can be slight temporary marks when using the MagSafe charger etc. but I seem to have permanent marks in this location without even using these accessories. Hard to get it to show up in images, but will attach if I manage to get a good one.

Thanks in advance