Track activity from LinkedIn

Hi all,

this is probably a basic question, but I can't figure out what's wrong with it: I want to track visits coming from social media, and I created reports to track each social media separately, with this logic:

Filter: visited web page
Web page: is any
Referrer: contains linkedin, facebook

I created two separate reports and while the one for facebook works fine, the one for linkedin shows no data even though I tested both.

What's missing?