Posts preview dissapeared from main page

Hello,

My website is https://www.thatrussiangrrrl.com.
I used to have the beginning of post visible under the featured image on the main page with a “read more” link under it, but now it seems to overlap with the Socialshare by Supsystic plugin I use and it’s just showing the social media buttons now. I used this plugin for 2 weeks or so, but only started having this problem today. When I deactivate the plugin, text shows again.

I will be thrilled if someone could advise on how to fix it.