Unable to purchase Battle Notification (Winter)

I've had this glitch since the December 4th/License Journey update where I can't purchase the Battle Notification (Winter) specifically. It's similar to the bug where people couldn't buy Vanguard Bell on release (which you were able to fix relatively fast). On mobile, there's no button to buy it and despite the 299 gem price showing it's sorted with my owned Battle Notifications. On Switch, there is a button to buy it but when I try to it gives me an error saying "You already own the maximum amount of this item" despite never buying it. Also from the Customization Menu on mobile, there's a greyed out button saying Unavailable even though it's in the shop. The bug started at the same time the Space Style Battle Notification was added to the shop (and I got this from the Prize Machine before the update) so I wonder if that's related. There's nothing stopping me from buying other Battle Notifications such as the Heartfelt and Super Suit ones. As a miscellaneous item collector, I hope you can fix this bug so I can have all the Battle Notifications. Thank you.