So the first time I met Decem, he got to this certain point where he does that one skill/move [Like the start of 2nd dialogue] (dont want to spoil anything about him). I just had this immense power of laggy hell where my frames dipped hard due to when he used it. Later on, the map had this light and when I went near it or went directly on it, I would get hit with the massive lagspike, but if im at good distance it doesnt harm me. It was fixed after I relaunched the game, I took a picture of it beforehand because it was really odd having that lol.
That bright circle of light ahead of my character is what the bug was if you're wondering which light lol Note: If you read my previous thread, Im using my better laptop to play this xD.