How thick do you slice your cucumbers? I shave mine on a grater and they’re fine in a couple of hours.
I use a mandolin with the thinnest blade/opening possible. My cucumber slices are thinner than tissue paper and you can read a newspaper through them.
I actually learned how to slice them using a potato peeler, as a child and my slices were about as thin that way too.
Do you top it off with white pepper and/or a dollop of sour cream? I don't use either, but have seen it served this way in the Hungarian recipe book I have, that was written by Edward Weiss. He's the grandson of Paprika Weiss, who was the originator/owner of THE premiere importer and seller ( through his self named store ) of real Hungarian paprika ( and later, other Hungarian spices, foods, and other products ), in NYC. My family knew that family and that's where they, and I always bought paprika and other things.