While I did a lot of troubleshooting: Reset LR preferences, updated video driver, turned GPU off/on and a new catalog all with no effect. Also downloaded some other test photos to check that there were no cameraa settings from my own photos causing the issue. A better description of the actual bug: The use of "previous button" applies crop settings even when no cropping was done to the source photo and the destination photo has a different pixel h/w ratio than the source photo. (LR thinks that since the pixel H/W ratios are different then this should be included in the settings to be applied.) In previous versions of LRC when you clicked on the "previous" button it ignored? the photo pixel dimensions when the setting were being applied if you had not used the crop tool on the source. Now, with the bug it is also looking at the image dimensions and including them in the "previous" setings if the two photos do not match ratios. I found that the Nikon cameras D750, D780, D810 and Z6 all have pixel H/W ratios that are not exactly 1.5 (i.e D750 = 1.498007968) The Nikon D500, D850, D5600, D6 and Z7 are all exactly 1.5 So, if you use the previous button without any cropping changes between a D750, D780, D810 or Z6 and another camera then a crop occurs. If it is done between a D500, D850, D5600, D6 or Z7 then no cropping occurs. No cropping occurs between photos from the same camera type. This action would be acceptable when you do a copy/paste or sync settings and you explicitly select to include crop, but should not be included in "previous button" use if no cropping was previously performed on your source photo. I found the same issue occuring with my old desktop and laptop (tried reverting my laptop back to LRC versions 10.3 and 10.2 and had the same issues) I have not done much photo editing for a while due to covid preventing my normal photo events from happening so only noticed this recently. So, not sure when it got introduced but I know it was not a problem before. Chart of the pixel H/W ratios I refer to above: Nikon Camera H W Ratio D750 6016 4016 1.498007968 D780 6048 4024 1.502982107 D810 7360 4912 1.498371336 Z6 6048 4024 1.502982107 D500 5568 3712 1.5 D850 8256 5504 1.5 D6 5568 3712 1.5 Z7 8256 5504 1.5 D5600 6000 4000 1.5
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