Round Tripping pixel geometry issue

Hi!  I'm selecting 'Edit with Photoshop' and when they open in PS 2022 and saved, the pixel geometry is VERY SLIGHTLY tweaked from the original file in C1.  The pixel dimensions of the file are identical, but they don't line up pixel-for-pixel.  It's like there's a slight lens tweak, or aspect ratio going on.  All the export settings in C1 are set flat, there should be no manipulation of the geometry at all.  However, each time I round trip the file, it's tweaked.  Any suggestions for some deep setting that i'm missing, or what's happening here?  Trying to create some complex masks in Photoshop and be able to bring them into C1 for adjustment layers.  I've got the masking method working good.  The problem is in that dang pixel geometry, and my masks are 'off' of the original image when I copy them over, and can't make use of them.  I really would like to find out where this TWEAK is happening during the round trip.  ANY info is appreciated!