Hi Gretchen -- I have 3 pair of these boots, so you just know I am a fan!
When you say right behind the elastic, what do you mean? Inside? Or is it on the front? Not sure I understand...
My black pair gave me a tiny bit of rubbing on the front of the ankle on first wear but by the next time it didn't bother me. My taupe pair were comfy out of the box but once in a while the zipper edging will bend inwards instead of laying flat and in that case I get rubbing along the inside ankle. I have learned to do them up more carefully and now they are problem free. No issue at all with the snake ones, but then I am used to wearing them by now!
I hope yours soften or you identify the source of the problem and can fix!