Phebee

Try:

a.social-icon.icon-feed {
  display: none;
}

I had a search around for documentation because I was wondering the same thing, but I couldn’t find anything.

However, I did have a play around and this seems to have worked for me:

[wp_colorbox_media url="#my-html" type="inline" hyperlink="Click here for popup"]

<div style="display:none;">
   <div id="my-html" >
     <p>This is my <strong>HTML</strong> content.</p>
    </div>
</div>

I’m having the same problem on multiple websites. Fine in other browsers but not working in Chrome. If you find out the answer please post it here.
And example is on: https://preppersafehomes.co.uk/