For a while now I'm experiencing this issue.
That is, when I ,for example, complete a drama or I finish an episode I go to the "edit" window and update my progress, rate the drama and stuff. There under the "status" it says "share" and it used to show a few social media icons including MDL and I was able to share my progress on my friends feeds by clicking the MDL icon.
For a while though next to "share" there's nothing and I can't share anything either. I thought it was a common thing for everyone, but I've been seeing on my friends feeds multiple people sharing their progress so I guess it's only me.