Must be something in the UPC labels identifying the cell(s) manufacture/assembly date and location if from the same Chinese production line.
I sure would like to see a label picture of both yours and Tracy's and Jolee's pack. When posting the pictures, please add the footnote - R/C 200 good pack, or R/C 200 needs replacement Perhaps some bar run is common between the 3 UPCs that would give a good basis of determining that. There are UPC decoders out there, even if you wind up with a bunch of numbers that don't make much sense, someone may be able to piece it together. If we also had a couple of pictures of pack labels that do require replacement (pending after R/C 200) that would help as well

I also posted on the Niro EV forum if some label pictures could be posted, (to compare the SK innovation UPC codes as well but no one has offered - yet)
I am sure the replacements will be LG, but it would be nice to have Kia labels just to see if SK Innovation cells are involved with the actual replacements.
Long shot...you bet, but what else do we have to work with other than the tight lipped communication Hyundai Corp and it's dealers are providing owners.