I was looking for Zypher in the Teachers Lounge chat, and he showed up in the autocomplete, so I assumed he was in the room. But no:

![enter image description here](https://i.stack.imgur.com/3CYAX.png)

That's the autocomplete

![enter image description here](https://i.stack.imgur.com/r7GDw.png)

That's the list of people in the room

![enter image description here](https://i.stack.imgur.com/OSH4q.png)

And that's Zypher's gravatar, which if you squint hard enough you'll see that he's not in that room (whether he's on chat at all, I don't know).