Kind of annoyed.

I noticed some of my bots will show the #musicmania2 tag, play the music attached and show up among the thousands of other bots. Which is cool. Now I've noticed that for other bots, the attached soundcloud songs will show up and play just fine, and I include the proper tag. The bots are public, yet when I save the character, the tags themselves disappear. So I guess my question is, why does this work for some bots and not others?