It’s not as though it wasn’t expected. The behaviour and algorithms users and social media networks are intended to filter ideas to suit our individual perspective. That’s a major reason people use the big engines like Google and Facebook.
But that behaviour encourages groupthink. The user only clicks on stories and links that match their own desires and perspective and the engine tends to serve stories and links that the user prefers to click. It’s a self-reinforcing process.
The result is that you get a narrower view of the world. You don’t hear stories or connect with people that you have differences with. This reduces your information as well as your perspective. That means you don’t develop ideas; your thinking is less critical.
The solution? Every now and then, click links that you would normally avoid. Even if you don’t read them it will diversify the feed you get from the big engines. Use a different search engine which does not track your behaviour so that the search results are generic and diverse (try duckduckgo or ixquick for exmaple).