Images shown with wrong measurements

[ninetyralph]

Hello, I've seen Fiverr has a recommended resolution of 1280x769 for gig pictures, and at the moment of placing them in your gig, they fit and look perfect, but as soon as you see your page as a buyer, the images look stretched and ugly as hell, what am I supposed to do? predict this to happen and prestretch the images? Please fix it so they show correctly, just like YouTube thumbnails for example do.
I'll leave a comparison, cause it's really annoying and doesn't look professional, thank you.

This is on my seller's site, they render properly:

And this is what buyers see:

You can feel how it isn't natural, they scaling isn't proper.

Edited June 22, 2022 by ninetyralph