Unknownreported this bug
As the title explains, the mechanic spawns a wither skull at 0,0 in the overworld when used. This happens no matter where it is being used or how it is being used. The mechanic itself works and generates no errors but leaves behind the previously mentioned wither skull which also causes a crash if the chunk it is in is loaded. I have attached an image of the bugged wither skull. [Legacy attachment omitted]