Rakshasa’s Great Katana issues

I’m not sure if it’s my internet, the game itself, or something else. I’ve noticed a lot of times when I hit an enemy it won’t accrue the damage. The fx will que as a strike and it’s clearly a hit, but sometimes no damage will be dealt. It’s mostly on coop. I’ve noticed it a lot the last couple of days. Has anyone noticed any bugs with Rakshasa Great Katana like this?