While pre-orders for the iPhone 12 Pro Max and 12 Mini opened on Friday (here's where to get the best deal), Apple also began selling its classic leather cases for the iPhone 12 models. But a potential problem has been discovered when combining leather accessories with the new MagSafe chargers.

In an unusually transparent move, Apple has warned customers that MagSafe chargers can leave round marks on the leather cases. But in a new and startling development, the company actually shows, in the official photography on the product's store entry, what this mark is likely to look like after a period of use:

iPhone 12 leather case with MagSafe mark

In an accompanying text, the company writes that customers who are bothered by the round mark should choose Apple silicone cases or transparent plastic cases instead.

Wondering whether to buy one? Read: Should I get MagSafe Duo?

Read our guide to the best iPhone 12 cases and iPhone 12 mini cases for other alternatives. We also investigate how the iPhone 12 case that shows the time works.

This article originally appeared on Macworld Sweden. Translation by David Price.