If you see messages directly from `@matrixbot` in the chat area, then that means that the room is still plumbed using the old Gitter bridge. We're working on a plan to migrate rooms using the old bridge over to the new one, https://gitlab.com/gitterHQ/webapp/-/issues/2674
There isn't really a plan for private/invite-only rooms but we could possibly support `virtualUsers` in the `sd.extraMembers`(security descriptor) field to allow inviting Matrix people to a private Gitter room.
If you use the "Announcements" settings, you will see this behavior but is also described in the notification modal as an oddity. This is tracked by https://gitlab.com/gitlab-org/gitter/webapp/-/issues/1205 which is a huge pain in our notifications that I want to address.
If you use the "Mute" notification setting, you will only get emails for messages the mention you which sounds like you're after.
`@matrixbot` does show in the browser notification but we do plan to fix that up: https://gitlab.com/gitterHQ/webapp/-/issues/2695
If you see messages directly from `@matrixbot` in the chat area, then that means that the room is still plumbed using the old Gitter bridge. We're working on a plan to migrate rooms using the old bridge over to the new one, https://gitlab.com/gitterHQ/webapp/-/issues/2674