Missing social media buttons in posts and in sidebar in Chrome

My website is http://www.livinlavitadolce.com and some times the social media icons in the sidebar and on the right hand side of posts don’t show in Chrome for PC. They always show on the iPhone. I don’t use a child theme because I use the built-in CSS editor. Also, I checked IE and the icons are visible although I’ve only checked once. Anyone know why I some times can’t see the social media icons in Chrome for PC? Thanks, any ideas would be great!