Carvana images are stretched

I’m working through Lesson 14 - specifically the image segmentation with Carvana.

Everything is working great - even getting better results by using 1cycle. But I just noticed that all the images are squished.

Is this intentional? Is this a mistake or a shortcut?

Wouldn’t it have made more sense to use padding? Thanks!

original
resize
original-mask
resize-mask