`Chat.name` disappears when `unreadMessages` becomes zero

Hi team,

I've noticed an unexpected behavior in the `Chat` table.

The value in the `name` column only appears when `unreadMessages` is greater than zero. As soon as `unreadMessages` becomes zero, the value in the `name` column disappears (gets set to null).

Is this behavior expected? If so, could you explain the reasoning behind it?

Thanks in advance!