Lavand “water lily” silky strapless dress

Lovely dress worn once. Bought from a boutique in Corning. Great condition; however there might be a possible flaw shown in pic #6. I did not notice this when bought the dress. The line runs vertically on the front and back of the dress. Unnoticeable unless looking for it. The dress never had and does not have any hanging strings or holes. To my eye it’s as perfect as it was when bought. Size is large, but I wear medium size 8-10 clothes.