I suspect this doesn't only happen in the trending news feed. From my own experience: I shared an article by Douglas Roushkof (https://www.theguardian.com/techn

I suspect this doesn't only happen in the trending news feed. From my own experience: I shared an article by Douglas Roushkof (https://www.theguardian.com/technology/2016/feb/12/digital-capitalism-douglas-rushkoff https://www.theguardian.com/technology/2016/feb/12/digital-c...) and several of my friends weren't able to see it, even after they opened my timeline.