When I comment on stuff here why are there brackets around the persons screen name?

@Peaches this is an example of how it looks.👀 I don't remember it like this before?
Okay, the brackets don't show up when I post the question, it's around my name and I can only see it BEFORE I post the question....?!

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GJOFJ3 · 61-69, M

That is new

Peaches · F

@GJOFJ3 Right now your screen name is in brackets, are you seeing it?

GJOFJ3 · 61-69, M

@Peaches no. You just see it before you hit reply. Then it goes away

Peaches · F

@GJOFJ3 I'm so glad I wasn't the only one seeing this?!👀

GJOFJ3 · 61-69, M

@Peaches you're OK you haven't lost your grip yet 😃