[PantherPrincess]

Nope, I've been grinding the character it happened on. I assume it was a momentary bug due to beast raid event and me swapping my sub class around before heading into battle. It went invisible in my main hand slot, yet still let me use sword skills during the battle. After reboot it was completely gone. I'll be sure to screencap it if it happens again but so far I haven't had any issues. It was a wooden katana if that means anything.