Border of a box when scrolling looks weird

Hi! I don’t know why the top border of the div “scrolling text” is looking weird, like it’s crawling.
Does anyone knows why???

Thanks!
N.

https://preview.webflow.com/preview/la-sarria-web-40a3aa92753cb329ba0260f07?utm_medium=preview_link&utm_source=designer&utm_content=la-sarria-web-40a3aa92753cb329ba0260f07&preview=7fb7bec436748845fa76bce6de6f8a1d&pageId=60740ff960222464fb8ad8f4&mode=preview


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