Top Categories function omitting social/music for regular posters

Something seems to be a bit weird with the Top Categories summary on a lot of users’ profiles. As you’ll see in the thread I started (assuming most people would have social/music as top categories) a lot of the most regular posters actually have those two categories absent from their top list. Less frequent posters seem to consistently have social and/or music at the top.

Any ideas why?

i’ve found some that have music appear in their list but not social (where it is expected to)

Not sure what you mean. Are you taking about the threads I see under each here?

Oh sorry, I clicked through. Yeah no idea TBH. Mine seem pretty random.