When you open an image, it expands and cuts the border

Please post a screenshot of the entire Lightroom window with the image open in Develop.

Make sure that the History panel is visible and expanded on the left, and the Lens corrections panel visible and expanded on the right.

It seems that when you open the raw file, you automatically correct the lens. Is there a lens calibration on/off function?

Please try to reset the Lightroom preferences.

https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/

It's recommended to backup your preferences before you reset the preferences to the default settings:

https://helpx.adobe.com/lightroom-classic/kb/preference-file-and-other-file-locations.html

If this doesn't help we need more informations about your environment.

Which operating system do you use?

Which version of Lightroom do you use?

Please post the exact version and not only phrases as "recent", "latest" and so on.

Please provide also a copy of your 'System Info'. This can be get from the LrC Help > System Info menu item.

There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.