Well, I pulled a sheet from the middle and the back of the pack and I cannot see this defect.
I did, however, discover that the small, red AC safelights sold on Ebay are NOT safe with Fuji HR-U Xray film. I did a 1 through 10 minute wedge with the film on my enlarger baseboard, about 5 feet away with the light reflected. There is practically no difference between the steps, but the ruler I laid over one edge was perfectly clear.
I am not saying these don't work for other applications, but be aware of my experience if you are thinking of using them for X-ray film.
https://www.ebay.com/itm/235241444895
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