I Have a Bug

I found a bug in the game. It can't hit monsters or people, and others can't see it. There's only a piece of grass in the report screenshot - only I can see it and touch it. It taught me how to move, how to read moves, and how to talk to a high-player girl. I went from a useless account that was robbed of monsters to a person who is ranked high on the server. Then one day, it was gone. I thought the official had fixed that bug. Later, there was a master on the server who no one could beat. He competes with me for monsters, first kills, and rankings, and he always has trouble with me. I fought him four hundred times, and the more we fought, the more things went wrong—— Every sword move of this man is so familiar that it makes me panic.