I'm running Lightroom Classic CC 7.3 on a MacBook Pro.
I have a photo that is 5472px X 3648px uncropped and 4834px X 3222px cropped.
I have an export preset that resizes the image to a max of 2048px on the long edge, which I use for posting to Facebook.
The issue that I'm having is that if I'm not connected to the drive that the original image is stored on and I use the export preset on the smart preview, I get an image that is 2261px on the long edge instead of 2048px.
This doesn't make sense.