P: Import is creating OS - level duplicate files named (-2) when using Devices rather than Files

This issue is so confusing. I am trying to see if I can replicate it somehow. Still nothing.

Please try to first copy the files from the Card to a folder on the desktop. Then open Lightroom Classic and import from the folder on the desktop. And see if the duplication happens this way also.

No, they appear with very long file names, completely different from original file.  Here is example:  B6A0D7A3-E28C-49AC-B049-126EF124E003_1_102_o.jpeg  This is in a folder that is named with a date, in this case 2021-03-11. It is in there with a bunch of unrelated images - all of them with the same preserved filename filenames. (individual file names not identical)  They are marked with the same capture date. (11 March) but they were not captured on that date. Some of them are years old and have never even been edited.     I finally found the original of my example, which is DSC_1352.JPG and stored in folder 2014-08-31.   That correlates with when the image was taken. 

Some of the files are sitting beside each other in the library preserved file name and normal.

I must say that recent imports do not seem to have this happen to them - not sure if that is yet to come.  I do not think I have changed anything in my import preferences, but I do import directly to an external hard drive, which houses all my lightroom images.  All the files - the 'normal ones' and the preserved filename ones are on this external harddrive.  What I wouldn't give for an actual human with good knowledge of lightroom to come to my house, sit in front of the computer and explain it to me!

Do the errors also show up when you import from files on your computer rather than through the card reader?

I also noticed that I get LR errors when the duplication happens. The import was 810 photos. Destination is my internal 2TB SSD inside Mac Studio with over 1TB free. I tried the next day with the same steps and didn't get this error nor dupes. It seems random or some race condition(s).

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Ha ha! I'm sure they ARE working on it!!!

Yes. I'm importing from Files (rather than Devices) > Nikon D850 (include subfolders) and it works just fine. It's now part of my regular workflow so Adobe can drag their feet as long as they'd like. Not that they need my permission.

@naestyoh  - does the work around bringing the photos in as files still work for you?

I am on MacOS 12.5 with LR 11.41 also  - my imports are normal - no duplicates..

I'm still seeing this bug

MacOS 12.5
LR 11.41

I used the front, internal SD card reader on new Mac Studio ultra. 

recently I discovered that the double up images with unusual file names, that were appearing without much of a pattern in my lightroom classic library, are preserved file name files.  My photo library is huge and I really do not need double ups.

I would like to understand why these images are appearing - sometimes beside the original camera image, sometimes in a clump of preserved file name images in no particular order.

I would like to know if there is something I can do to stop this happening.  Why it only happens with some images and not all.  and how to get rid of the double ups efficiently, without accidentally deleting files I need to keep.

Now, I am also discovering a jpeg, beside a pdf, beside a preserved file name.  Either my computer has harbouring a glitch machine or I am doing something to make it happen.

From what I see, this has been an ongoing bug for some people even before the latest versions! Glad to hear my workaround did not cause duplicates... When LR first came out, Julianne Kost said in a presentation that first copying the images from the card to her computer  and then importing to LR was her "safe" way. She may have changed since then, but I personally have always copied then imported from the folder on my computer desktop, figuring if there were a glitch with the software along the way, my images would be still be safe on the card. Sort of my personal insurance policy. I thus always have two copies and then import....Of course, when I have copied the images to their new locations , I can then safely erase my memory card. And when I have made a back up of my main photo storage with the new images, and thus have two separate copies in two separate drives, I can safely delete the folder on my desktop that was the temporary storage.   Those who need to work quickly say it adds time and steps to their workflow...Still safer....Plus with the new CFExpress cards, LRC apparently sees the card in the card reader as an external drive and allows you to "Move" the images from the card into LRC.... which means if you did have a power glitch or something, your images could be zapped along the way!