What is this lock user that keeps chatting in sqaures?

[MaxthedaydreamerXMx (maxzieblox)]

I was playing agame I made with some friends but kept seeing this

Why is that?
(Is this related to HD Admin?)

[EzraPalo (EzraPig)]

new update, it shows ppl chatting in different age groups as u i think

[Test] Optimizing Social Context through Experience Chat Visibility

Hi Creators, We’re currently running a test in Experience Chat designed to show the chat activity in your experience while maintaining our safety and age-check standards. Starting today, you may notice chat activity indicators appearing in the chat window. This appears when a user hasn’t completed an age check or when two or more players in different age groups are chatting in the same experience. [image1] We believe that showing chat activity, even without visible message content, helps …

[dark_kill19421real (Dark)]

(this also happens when you dont have chat unlocked: you’ll just be seeing a bunch of emojis, just roblox trying to use FOMO to lure childrens into giving their faces/IDs)