Q: Why do some of profiles say I have not participated in any tags yet? I took a look at my profiles and found that my profiles at Puzzling and Code Golf both say that I have not participated in any tags yet, although I do have answers with upvotes on both of these sites.

Looking around, I found plenty of other users whose profiles' have the same problem. On the other hand, my profile at StackOverflow does show top tags (although I only have zero score questions/answers there). Is this a bug, or is there some other documented reason that I can't seem to find with a google search?
