Anyone else having trouble with dwellers not showing up to your vault

What do you mean? I have dwellers show up at my vault, but I had only 1 for sure maybe two. The main way you get them without a radio station is to make children. I don't think this it broken just rare. I have a radio station but I keep doing other things with my Dwellers and have not had 4 of them in my double wide radio station to see how well it works. I have only been playing since I downloaded it last night so I have a lot to discover.

Early on, you do get a few after the initial ones. Not much, though.

I started last night and since then I haven't had any show up aside from 2 this morning. I think maybe that's it and from then on you are meant to get more by other means.

The main way to get them is to have your dwellers make children by dragging a male and a female into the living quarters. Just leave them be and eventually they will go into the bed area. I am sure you know this, but just in case. The other way is to build the radio room. You will broadcast out to other survivors. I usually have one show up every 2 hours or so.

We will just have to wait and see, I guess, if they show up after the initial few. Maybe it's a once a game day sort of thing.