Odd bug between game and OP.gg

So I just had a game where I was gonna open a report. Went to the guys OP and noted that he had a different name. In game his name was

XXXX (i x'd it out)

but on op.gg - same game, same tristana, the name was

CHINESEXXX (Induced the word Chinese, and missed the last letter of their in game summoner name)

So, whats up with that?