This occurred after I died to him the first time and has appeared for every subsequent fight.
woah interesting thanks for the report, passing along to the team
Did you use paint? Thats looks like windows paint my friend 
No that’s for sure in the game. To give extra context it looks like it’s falling down from the top of the arena. Not sure what caused it and it disappeared after I closed the game and came back later.
Ok i was being sarcastic but that was funny hehehe. Now you put that “bug” in the Echo Knight fight and i would think the devs were messing with us.
Now that i look at it if that pink blob is the hitbox of the sword its way off, the sword is a little down bellow, and what the hell is that rat head?