The images appear to be slightly cropped after import. Why does that happen? How to avoid that?
This usually happens because of the automatic lens correction, which hides distorted areas. To avoid this, go to the Lens Correction tool in the Lens tool tab and open the 3-dots menu . Select Disable Default Lens Correction and make sure the checkmark is there.
If the same thing happens even after disabling default lens correction, set the value of the Distortion slider to 0.