Simplex is kind of weird. I'm still figuring out how it works myself 😅 my understanding is that the group host device must be online to allow new users to join the group. So it could've been that there was a bad timing that the device was off line for a moment when you tried to connect. By now, it *should* be connected.

Not to mention, sometimes a message is not visible to another user, which I guess is an issue due to large group sizes (you'll notice it takes a while to send a message in the RoboSats group). But its private 😁 you can use an anonymous identity to chat in the RoboSats group