Slack's two Link Previews are just TOO much

Behold - the double preview!

Solution

• Look for duplicate content in the og:title, og:description and prevent double posting

or, simpler yet:

• Only create a Link Previews for the first url in a message. 

More on this topic yesterday - https://www.xeyecle.com/2018/07/zoom-url-previews-in-slack-guide-to.html