Hidden Rows Leave One Pixel LIne on Screen

I’m getting a weird single line displaying whenever a row is hidden by device. Mobile only hidden rows leave a single pixel line where they are in the page order on desktops. And the desktop only rows leave a single pixel line visible on the mobile device. So effectively the rows are never actually completely hidden and it looks bad.

Here’s the pages it’s happening on: http://engagedvideo.com/services/

Can someone explain how to fix this issue?

Thanks.