Event skin purchase unavailable?

I saw a few other people having this same issue but absolutely no response from anyone, I've tried contacting EA support about this and nothing quite helpful. I opened a few of the new event loot boxes by purchasing them as I was building up crafting material to purchase one of the skins outright. Through the boxes I obtained 32/53 items, getting the Revenant skin, Conduit skin and Ash skin. The one I wanted to purchase was the Octane skin, but when I go to purchase it now that I have the crafting material, it shows up as "Unavailable"? Is this because I own more than half of the pack pool? Why would there be an option to purchase a skin, then make it unavailable to buy later on? It's a bit frustrating because I really wanted to get the octane skin :(