When trying to edit an image in the develop module it decides to fatten a vertical image.
We're sorry that Lightroom is showing your images in the Develop module differently than what expected.
Could you please let us know the version of Lightroom you're using?
Also, disable the use of GPU in Lightroom, uncheck the option "use graphics processor" from Preferences> Performance menu and let us know if that helps?
Retrieving data ...