I've just noticed odd behaviour after recent LR update on my Win10 64bit - I'm processing photos from 1 photoshoot, using nikon d700 and 50mm lens for all of them.
As conditions are the same, my workflow is to apply settings to first photo and then sync across rest of them so if I'm selecting multiple images and then sync settings either from Library or Develop module - that's great, working fine and as expected.
However, sometimes I'm doing manual tweaks and then I want to apply those settings to the next photo so what I'm doing is: in Develop mode, go to the next image and hit "Previous" button next to "Reset" - when this is used the image is getting marginally cropped (probably by 1pixel) even when previous image wasn't cropped at all.
This change is only marginal but alters the aspect ratio without user's knowledge and only indication is a small crop icon in the filmstrip thumbnail.
Greetings, Updates to Camera Raw, Lightroom Classic and the Lightroom Ecosystem products for Desktop, Mobile and Web, were released today and contain a fix for this issue. Please refresh your Creative Cloud application and install your update when it becomes available. Thank you for your patience.