Where did the Sci-Fi hats go???

Not able to spend money on the game really, so its taking me a long time to come up with black pearls.  I noticed today when I was looking in the hat shop that not only the Sci-Fi hats are gone, but also all the other hats in the section.  What happened?  Can anyone elaborate?  I hope that I can collect the rest of the Sci-Fi hat set. 👍 🤞 Thanks,fryer