sharrre social icons displaying correctly only in IE

I have a problem with Sharrre social icons showing correctly only in IE (version 11 in my case): https://postimg.org/image/642vlp3i1
At the same time with Chrome, Firefox and Opera I can see only twitter icon and +, like this: https://postimg.org/image/vhvex450l/

I disabled all plugins and found out that nothing changed with it.

I can only guess that it is somewhere in JS or jquery that states something specific for IE only – but so far no luck with finding it.
Also in IE the social icons are riding together with scrolling, in other browsers they stay fixed in one place.

I’m using WP 4.4.2 and Hueman 2.2.5.
Help would be much appreciated.