Profile image skewed / stretched

[David]

Occasionally, when vendors upload a store profile image, that image is getting cropped and resized and ends up looking skewed or stretched on the store’s page. It just happened with a vendor using an image that was 1071x1070px. The actual version that is used on the store’s page is 500px wide by 700px tall. Why?

BTW, it doesn’t seem to happen if they upload an image at 500px square.