Strange string alteration from message

[elzlol420]

Hello,

I'm trying to make a small addon using guild message history. I get message content via C_Club.GetMessagesInRange, and parse them.

However, message content acts weirdly, here's an exemple :



Message content is "Bienvenue !" but I don't know why it says 7 character long, and lowercase is "u53".

Do any of you guys know what's going on here ?